compiling in Windows2000

Dear all,
I am currently support a collection of device drivers under
Windows NT thanks to OSR list. I need to port these drivers
under Windows 2000 as well. When i am trying my first attempts,
i get nmake errors :
“nmake.exe failed - rc = 2”
I can not overcome this. I used several options of build
in order to print the error but i was not able to do so.

Please help.