Reality Factory

Every time I make a level in RF, I get this error Comipile Failed: GBSP_CreateBSP encounted an error, GBSPLib.dll

Here are my computer specs
Pentium 4 2.90ghz
256 Ram
64MB video card.

Please help me

Post the date and number of bytes of

A. Realityfactory.exe
B. GBSPLIB.dll
C. Gameentitydatatypes.h

1 or more might not be compatible