php and Windows 2003 Server

I am installing it the old fashioned way, manually setting it up. When I attempt to run a php script I get the following error: "The application has failed to start because ntwdblib.dll was not found. Re-installing teh application may fix this problem." However, looking at another php install that I have, I am unable to track down where the path is to locate these dlls, found in my c:\php\dlls\ folder. Any ideas? Thanks