I can give you the env varibale settings i have here on my WIn2k server. Wat release of OneWorld have you installed. Have you installed VC 6.0 along with SP5.
The env variable settings related to VC are..
include
C:\Program Files\Microsoft Visual Studio\VC98\atl\include;C:\Program Files\Microsoft Visual Studio\VC98\mfc\include;C:\Program Files\Microsoft Visual Studio\VC98\include
lib
C:\Program Files\Microsoft Visual Studio\VC98\mfc\lib;C:\Program Files\Microsoft Visual Studio\VC98\lib
MSDevDir
C:\Program Files\Microsoft Visual Studio\Common\MSDev98
path
C:\Program Files\Microsoft Visual Studio\Common\Tools\WinNT;C:\Program Files\Microsoft Visual Studio\Common\MSDev98\Bin;C:\Program Files\Microsoft Visual Studio\Common\Tools;C:\Program Files\Microsoft Visual Studio\VC98\bin
Please see that your drive letter and installation directory are proper