Displaying Draft folder messages Link Error

Hi , I'm trying to display all the messages in a draft folder Using the following method in the application engine:
#include <badesca.h>
#include <e32des8.h>
#include <e32des16.h>
#include "MyEmailEngine.h"
///----->Getting The Draft Folder Of Sms Messages
void CMyEmailEngine :: GetAllMessagesFromSystemDraftFolderL(CDesCArray& tempMess)
{ _LIT(KDraftString,"\t%S");
TBuf<2000> aDraftString;
TBuf<1000> tempBuf;//iMsvSession
////CMsvEntry* entry = iSession->GetEntryL(KMsvDraftEntryId);
CMsvEntry* entry = iMsvSession->GetEntryL(KMsvDraftEntryId);
CleanupStack::PushL(entry);
CMsvEntrySelection* entries = entry->ChildrenL();
CleanupStack::PopAndDestroy(entry) ;
//entry = NULL ;
TInt nCount = entries->Count();
for(TInt index = 0; index < nCount; index++)
{
TMsvId entryID = entries->At(index);
//entry = iSession->GetEntryL(entryID);
entry = iMsvSession->GetEntryL(entryID);
CleanupStack::PushL(entry);
TMsvEntry msvEntry = entry->Entry();
TPtrC nn = msvEntry.iDescription;
tempBuf.Zero();
tempBuf.Format(_L("%S"),&nn);
tempLength = tempBuf.Length(); //always 60 if message is more than 60 characters
aDraftString.Format(KDraftString(),&tempBuf);
tempMess.AppendL(aDraftString);
CleanupStack::PopAndDestroy(entry); // entry
}
}
///----->End
When I compile the project it gives the following Link error:
Linking...
Creating library C:\Symbian\7.0s\Series60_v20\\Epoc32\release\wins\udeb\z\\system\apps\InternetEmail\InternetEmail.lib and object C:\Symbian\7.0s\Series60_v20\\Epoc32\release\wins\udeb\z\\system\apps\InternetEmail\InternetEmail.exp
InternetEmailEngine.obj : error LNK2019: unresolved external symbol __chkstk referenced in function "public: void __thiscall CInternetEmailEngine::GetAllMessagesFromSystemDraftFolderL(class CDesC16Array &)" (?GetAllMessagesFromSystemDraftFolderL@CInternetEmailEngine@@QAEXAAVCDesC16Array@@@Z)
C:\Symbian\7.0s\Series60_v20\\Epoc32\release\wins\udeb\z\\system\apps\InternetEmail\InternetEmail.app : fatal error LNK1120: 1 unresolved externals
Build log was saved at "file://c:\Symbian\7.0s\Series60_v20\Series60Ex\InternetEmail\Deb_S60_20_WINS\BuildLog.htm"
InternetEmail - 2 error(s), 4 warning(s)

Although that I included all the libraries + Headers needed for the project (method) but still the error continued, when I comment on the method every thing on the project goes successfully which assures that the problem coming from the method(GetAllMessagesFromSystemDraftFolderL).

Here Is the (mmp) file of the project:

TARGET MyEmail.app
TARGETTYPE app
UID 0x100039CE 0x101FF1C8
TARGETPATH \system\apps\MyEmail
SOURCEPATH ..\data
RESOURCE MyEmail.rss
RESOURCE MyEmail_caption.rss

SOURCEPATH ..\src
SOURCE MyEmailApp.cpp
SOURCE MyEmailAppUi.cpp
SOURCE MyEmailDocument.cpp
SOURCE MyEmailContainer.cpp
SOURCE MyEmailEngine.cpp

LANG SC
USERINCLUDE .
USERINCLUDE ..\inc
SYSTEMINCLUDE .
SYSTEMINCLUDE \epoc32\include
LIBRARY bafl.lib
LIBRARY euser.lib
LIBRARY apparc.lib
LIBRARY cone.lib
LIBRARY eikcore.lib
LIBRARY eikcoctl.lib
LIBRARY avkon.lib
LIBRARY commonengine.lib
LIBRARY msgs.lib
LIBRARY mtur.lib
// [-] LIBRARY edll.lib
AIF MyEmail.aif ..\aif MyEmailaif.rss c8 context_pane_icon.bmp context_pane_icon_mask.bmp list_icon.bmp list_icon_mask.bmp
Here Is also The Header File Of the project:
// INCLUDES
#include <e32des8.h>
#include <e32des16.h>
///
#include <e32std.h>
#include <e32base.h>
#include <msvapi.h> //of MsvSession
#include <msvstd.h>
#include <imapset.h>
#include <pop3set.h>
#include <msvfind.h>
#include <msventry.h>
#include <msvids.h>
#include <mtclreg.h> // for CClientMtmRegistry
#include <mtclbase.h> // for CBaseMtm
#include <mtmuibas.h> // for CBaseMtmUi
#include <mtuireg.h> // for CMtmUiRegistry
#include <miutset.h>

#include <popcmtm.h> // for POP( commmands )
#include <impcmtm.h> // for IMAP( commands )
#include <badesca.h>
#include <badesca.h> //CdesArray
#include "internetemail.hrh"

// FORWARD DECLARATIONS

// CONSTANTS

// not needed in one protocol implementation
enum TProtocolType
{
EProtocolNULL,
EProtocolPop3,
EProtocolImap4
};

enum TInternetEmailEngineEvent
{
ERemoteCountChanged,
};

// CLASS DECLARATION

/*
* */

class MMyEmailEngineObserver
{
public:
virtual void HandleEngineChangedEventL(TInternetEmailEngineEvent aEvent)=0;
};
/*
* */
class CMyEmailEngine : public CActive, public MMsvSessionObserver
{
public: // // Constructors and destructor
static CInternetEmailEngine* NewL(MInternetEmailEngineObserver& aObserver);
//static CInternetEmailEngine* NewLC();
~CInternetEmailEngine();

public: // New functions
// MAIN USER API

/*
* RemoteOpenEmailL(TInt aIndex)
*
* Uses generic messaging architecture and opens selected message entry.
* May generate dial-up connection to fetch message body.
*
* @param TInt aIndex index to message entry to be opened
*
*/
void RemoteOpenEmailL( const TInt aIndex);

/*
* void RemoteFetchL()
*
* Initiates remote mailbox fetch process
*
*/
void RemoteFetchL();

/*
* void SetProtocolL( const TInt aType );
*
* @param TInt aType type enumeration of selected type
*/
void SetProtocolL( const TInt aType ); // not needed in one protocol implementation
TBool IsProtocolSet(); // not needed in one protocol implementation

// For view handling( see InternetEmailContainer )
TPtrC RemoteEmailTextL( const TInt aIndex);
TPtrC RemoteEmailSenderL( const TInt aIndex);
TInt RemoteEmailCount();
void GetAllMessagesFromSystemDraftFolderL(CDesCArray& tempMess);
TBool IsEngineReady();
/*
* TBool CheckIfExistsL( const TInt typeenum )
* Checks if service entry( Email settings ) exists for
* given internet email protocol type.
*
* @param const TInt aTypeEnum type enumeration of given protocol type
* @return TBool ETrue if protocol of given type exists
*
*/
TBool CheckIfExistsL( const TInt aTypeEnum );

void CancelOperation();
void Queue();

public: // Functions from base classes
// from CActive
void RunL();
void DoCancel();
TInt RunError( const TInt aError);

// from MMsvSessionObserver
void HandleSessionEventL(TMsvSessionEvent aEvent,TAny* aArg1,TAny* aArg2,TAny* aArg3);

// private
private:
CMyEmailEngine( MMyEmailEngineObserver& aObserver );
void ConstructL();
void CompleteConstructL();
void DisplayMessageL( const TMsvId &aId );
TMsvId FindServiceL( const TUid aType );
TMsvId FindFolderThenServiceL( const TUid aType ); // not needed in one protocol implementation
void MailCommandL( const TInt aCommand, TDes8& aParams );
void LoadMtmL();
CBaseMtm* InstantiateClientMtmL( TMsvId aService, const TUid aType );
//for update
CMsvEntrySelection* UpdateEntriesL(const TMsvId& aServiceId);
void UpdateRemoteCountL();

// private types
private:

// internal state indication
enum TInternalState
{
EInitialising,
EReadyButNeedsProtocol,
EReady,
EConnecting,
EFetching,
EDisconnecting,
EDone,
ECanceling
};

private: //Data
MMyEmailEngineObserver& iObserver; //informs ui when to react to entry changes

CMsvSession* iMsvSession; //the server session itself, our highway to kernel space
CClientMtmRegistry* iClientReg; //registry used to find client mtm of given protocol type
CMtmUiRegistry* iUiReg; //registry used to instantiante views of given mtm
CMsvOperation* iMsvOp; //long lasting email operation object, used e.g. for cancelling requests
CMsvFindOperation* iFind;
TMsvId iServiceId; //service id of either protocol used e.g. as
TMsvId iId; //id of the mailbox( POP ) or inbox( IMAP ) used as a root of messagelist
TInternalState iState; //the state of the statemachine we implement by this engine

CMsvEntrySelection* iRemoteEntries; //array of entries used also as mailcommmand argument
TInt iRemoteCount; //count of message entries in given folder or mailbox

CBaseMtm* iMtm; //abstract mtm for use of both pop and imap
CMsvEntry* iEntry; //current selected entry
////CMsvSession* iSession;
// next members not needed in one protocol implementation
TBool iIsProtocolSet; //bool if protocol has been selected by user or not?
TBool iHasImapInbox; //boot have we made folder sync and got inbox?
TInt iProtocolType; //type of selected protocol, custom enumeration
TUid iProtocolUid; //uid of selected protocol for easier abstraction
TInt tempLength;
};

#endif

I'm getting Upset Why this Error Cntinued?