mexCatdir Undefined subroutine &main::mexCatdir

Hi,
I have tested follow the illustrate of the White Paper<>,see http://developer.nvidia.com/object/matlab_cuda.html

when input “nvmex -f nvmexopts.bat Szeta.cu -IC:\cuda\include -LC:\cuda\lib -lcufft -lcudart” in Matlab command. It printf:
“Undefined subroutine &main::mexCatdir called at D:\MATLAB\R2006a\bin\nvmex.pl line 1373.
??? Error using ==> nvmex
Unable to complete successfully.”

I don’t know how to solve the problem!

Thanks!