Access violation error on rendering flp project

Hello All,
I have been using FL Studio for 4 months now and did not have any issues so far. But now, I get an access violation error in ntdll.dll module while rendering my Flp project. I am using Windows XP professional and DirectX 9. I tried restarting my computer and reopening this project in FL studio several times. But every time I get this same error. What could be wrong with FL Studio now? I am absolutely in the dark. Please can anyone give me a solution for this error? Thanks a million.

Access violation at address 779E3B30 in module ‘ntdll.dll’. Read of
address 00000004.
