problem with Mex-setup and 'nmake' is not recognized

i have 2 problems

1)with mex setup i have download the compilers SDK then now the second problem arise i cannot run the file because stated that

Making simulation target "Test_4_sfun", ... C:\Users\user\Downloads\slprj\_sfprj\Test_4\_self\sfun\src>nmake -f Test_4_sfun.mak 'nmake' is not recognized as an internal or external command, operable program or batch file.

can somebody help me to fix this issue.. im using 64bit windows 8, and R2012b.. thanks a lot in advance

[Suneesh]

Are the installed compilers listed when you execute the following?:

mex -setup