CUDA 3 : Link error

Hi

During the compilation of my cuda kernel I got the following error message :

LINK : fatal error LNK1181: cannot open input file ‘.\Release\MyKernel.cu.obj’

I’m able to compile the project on Vista 32 bits - GeForce 8400, but not on my Win7 64 Bits - GTX 470

Do you have an idea of the problem ?