0xC015000F: The activation context being deactivated is not the most recently activated one.

[C++ Programming]

Dear all,
I am developing an application with VS2008, MFC 90.
There was an exception:0xC015000F: The activation context being deactivated is not the most recently activated one.I can not handle it.
The following is my call stack:
ntdll.dll!7c944a17()
[Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll]
ntdll.dll!7c944a17()
user32.dll!7e418734()
user32.dll!7e418bd9()
user32.dll!7e41885a()
user32.dll!7e418822()
user32.dll!7e4189cd()
> mfc90d.dll!AfxInternalPreTranslateMessage(tagMSG * pMsg=0x7e4189f0) Line 242 + 0x14 bytes C++
user32.dll!7e440457()
user32.dll!7e4196c7()
mfc90d.dll!AfxInternalPumpMessage() Line 183 C++
mfc90d.dll!CWinThread::PumpMessage() Line 900 C++
CapsvrTx.exe!CCapSvrRoot::LoadConfig(IUnknown * pICaller=0x00000000, int bRemoteSetup=1, int bMessagePump=1) Line 4716 + 0x20 bytes C++ // this is my function.
Your reply will be deeply appreciated. http://www.barakasoft.com/script/Forums/Images/smiley_tongue.gif
Best Regards.
Lance