dial a number after hangingup

Hi
below is code I use in an active class to detect a dialing event,
hangup the call and call a different number instead.

I encounter 2 problems:
1) Some times the call I initiate using DialNewCall (after hanging up a call) doesnt actually make a real call - I can see the dialing notification but no dialing occures.

2) When DialNewCall succeeds ,if for some reason I get an Idle event (for e.g if dest is shut down),I use CancelAsync(),DialCancel() and than Close() the call,but many times the device gets stuck after doing that.

What would you suggest me to change in order to make this code more stable? (without the device getting stuck and calls that doesn't work)

Thank you

//Event:Dialing
RLine::TLineInfo lineInfo; 
iLine.GetInfo(lineInfo); 
TInt openExisting = User::LeaveIfError(iCall.OpenExistingCall(iLine,lineInfo.iNameOfLastCallAdded));
RMobileCall::TMobileCallInfoV1 iRemotePartyInfo;  
RMobileCall::TMobileCallInfoV1Pckg des(iRemotePartyInfo);
iCall.GetMobileCallInfo(des); 
iRemotePartyInfo = des(); 
TBuf<30> callerNumber;
callerNumber.Append(iRemotePartyInfo.iDialledParty.iTelNumber);
	//Hangup the call (from AppUi class):
	TKeyEvent key2;
	TRawEvent ev1;
	TRawEvent ev2;
	RWsSession ws;
	ws.Connect();
	key2.iCode =EKeyNo;
	key2.iModifiers = 0; 
	key2.iRepeats = 0;
	key2.iScanCode =EStdKeyNo;
	ws.SimulateKeyEvent(key2);
	ws.Flush();
	ev1.Set(TRawEvent::EKeyDown, EStdKeyNo);
	UserSvr::AddEvent(ev1); 
	ev2.Set(TRawEvent::EKeyUp, EStdKeyNo);
	UserSvr::AddEvent(ev2);
	ws.Close();

//Event:Idle - make a new call
iCall.Close();
TBuf <100> newCallName;
User::LeaveIfError(iCall.OpenNewCall(iLine, newCallName));
CTelephony::TTelNumber telNumber(tsdNum->Des());
CTelephony::TCallParamsV1 callParams;
callParams.iIdRestrict = CTelephony::ESendMyId;
CTelephony::TCallParamsV1Pckg callParamsPckg(callParams);
iTelephony->DialNewCall(iStatus,callParamsPckg,telNumber,iCallId,CTelephony::EVoiceLine);


//if I dont get connecting event (number not available)
iCall.DialCancel();
iTelephony->CancelAsync(CTelephony::EDialNewCallCancel);
iCall.Close();
User::WaitForRequest(iStatus);
Cancel()