problem with nvmex nvmex is not working on my system

Hi all,
I would like to integrate cuda with Matlab 7.1.I have already done these stepsclick here,but these have no effect.When I try to run cuda files on matlab command prompt it gives me this massage ??? Undefined command/function ‘nvmex’.Can you tell me how to configure nvmex for window xp service pak.(Note :I am working in Emulation mode with visual stdio 2008).
Thanks in Advance