AnswerIncommingcall issue

Hi,

I am developing an application which displays an user friendly screen when an incomming call comes .

when i call iTelephony->AnswerIncomingCall(iStatus, iCallId);
application is giving Panic EUser 46.

So when i called SetActive() after iTelephony->AnswerIncomingCall(iStatus, iCallId);
Incomming call is being answered but the phone hangs.


This is my code

void CActiveIncomingCallObserver::RunL()
{

   if(iStatus==KErrNone)
   {
         if(!iCallActive)
         {
            iObserver->iWinGroup.EnableReceiptOfFocus(ETrue);
            iObserver->iWinGroup.SetOrdinalPosition(0, KMaxTInt);
            iObserver->iWinGroup.DefaultOwningWindow();
            CEikonEnv::Static()->BringOwnerToFront();
            iObserver->iWinGroup.SetOrdinalPosition(0, KMaxTInt);
         
            _LIT(KMyAppWindowGroup, "*cityid*");
            TInt wgId = CEikonEnv::Static()->WsSession().FindWindowGroupIdentifier(0, KMyAppWindowGroup, 0);
            CEikonEnv::Static()->WsSession().SetWindowGroupOrdinalPosition(wgId, 0);
            TApaTask iTask(CEikonEnv::Static()->WsSession());
            iTask.SetWgId(CEikonEnv::Static()->RootWin().Identifier());
            iTask.BringToForeground();
            
            iObserver->IncomingCallObserverInterface_HandleItL1();
            
                           
            iCallActive = ETrue;
      
                              
            iCallSelectionV1.iLine = CTelephony::EVoiceLine;
            iCallSelectionV1.iSelect = CTelephony::EInProgressCall ;         
            
            
            
            TInt rVal = iTelephony->GetCallInfo( iCallSelectionV1Pckg, iCallInfoV1Pckg, iRemotePartyInfoV1Pckg );   
            if(iRemotePartyInfoV1.iRemoteIdStatus == CTelephony::ERemoteIdentityAvailable)
            {
               
               TBuf<64> iNumber;
                iNumber = iRemotePartyInfoV1.iRemoteNumber.iTelNumber;            
                iObserver->IncomingCallObserverInterface_HandleItL(iNumber);
            }            
         }
      
   }

   

}


void CActiveIncomingCallObserver::ContinueWithCall()
{
   if (iCallActive)
   {

      CTelephony::TCallId iCallId;
          iTelephony->AnswerIncomingCall(iStatus, iCallId);
          SetActive();      
      //User::WaitForRequest(iStatus);
   
   }
}\
I don't understand where i am wrong.
Any help will be appriciated.
Thanks