fatal error c:1083

hello ppl…
i am new to cuda and jus strted it. after installing and integrating it with visual studio 2005 when i run the sample programs the debug complitatly fine but when i write my programs and build them i got an error

Error 1 fatal error C1083: Cannot open include file: ‘stdafx.h’: No such file or director.]

please help me…i search the interent but can’nt find anything meaningful…