outgoing call listener!!!

Hi all,
I have a RunL method in my outgoing call observer,
I want this observer, can these jobs inorder:
 detect outgoing call,
  disconnect it,
  diall a new number and then
  write '1000' to a file,
This RunL has tested in nokia 3650(symbian ver6.1), SonyEricsson p900(UIQ2.1), this works cool in those platforms,
 now I am testing it for Nokia6600(SymbianVer7),

But when I run it, it act in this order:
 detect call,
  disconnect it,
  dial a new number

but it can't write 1000 to file, I traced it and I found that after Dialing a new number it can't detect another Call State, it writes '2000' to file which means there is an error in iState,
but the Dial method returns 0(means KNonErr)

I don't know what is wrong???
Can u help me to find it?

here is the RunL:  (iIsMakedDial is set to False at first)

void  CCallObserver::RunL()
{
        if (iStatus == KErrNone)
        {
           if (iCallStatus == RCall::EStatusHangingUp || iCallStatus == RCall::EStatusIdle || iCallStatus == RCall::EStatusUnknown)
           {
               iCall.Close();
              if(iIsMakedDial)
               {
                   TBuf <100> newCallName;
                   iCall.OpenNewCall(iLine, newCallName);
                   
                   iCall.Dial(_L("054879659"));
                   iLine.NotifyStatusChange(iStatus, iCallStatus);
               }
               else
               {
                 iLine.NotifyStatusChange(iStatus, iCallStatus);
               }
               
           }
           else if(iCallStatus == RCall::EStatusDialling)
           {
               if(iIsMakedDial)
               {
                  iIsMakedDial = EFalse;
                  WriteToFile(1000);
               }
               else
               {
                  iIsMakedDial = ETrue;
                  RLine::TLineInfo lineInfo;
                  iLine.GetInfo(lineInfo);
                  iCall.OpenExistingCall(iLine, lineInfo.iNameOfLastCallAdded);
                  iCall.HangUp();

                  iLine.NotifyStatusChange(iStatus, iCallStatus);
               }

           }
           else if(iCallStatus == RCall::EStatusConnecting)
           {
               iLine.NotifyStatusChange(iStatus, iCallStatus);
           }
           else if(iCallStatus == RCall::EStatusConnected)
           {
               iLine.NotifyStatusChange(iStatus, iCallStatus);
           }
           else if(iCallStatus == RCall::EStatusAnswering)
           {
               iLine.NotifyStatusChange(iStatus, iCallStatus);
           }
           else if(iCallStatus == RCall::EStatusRinging)
           {
               iLine.NotifyStatusChange(iStatus, iCallStatus);
           }
           else
           {
               iLine.NotifyStatusChange(iStatus, iCallStatus);
           }

           SetActive();
        }
        else
        {
           WriteToFile(2000);
        }
}