how to build Mex files

HI.When i tape mex -setup i have this complier " Lcc-win32 C 2.4.1 in C:\PROGRA~2\MATLAB~1\sys\lcc " and his location C:\PROGRA~2\MATLAB~1\sys\lcc and i got this message:

Trying to update options file: C:\Users\HP\AppData\Roaming\MathWorks\MATLAB\R2010a\mexopts.bat 
From template:              C:\PROGRA~2\MATLAB~1\bin\win32\mexopts\lccopts.bat 
 Warning: The MATLAB C and Fortran API has changed to support MATLAB 
           variables with more than 2^32-1 elements.  In the near future 
           you will be required to update your code to utilize the new 
           API. You can find more information about this at: 
           http://www.mathworks.com/support/solutions/en/data/1-5C27B9/?solution=1-5C27B9 
           Building with the -largeArrayDims option enables the new API.

but when i write mex yprime.c i got this

    C:\PROGRA~2\MATLAB~1\BIN\MEX.PL: Error: 'yprime.c' not found.

i found this file in another directory but not compiled i found several errors. thank u

[Geoff Hayes]

Houayda - is the file yprime.c in the current directory? What is returned when you type the following in the Command Window

 which yprime.c -all