EDIT:
MY FRIEND HAS WINDOWS 7 64BIT AND IT WORKED PERFECTLY FINE ON HIS PC, FIRST TRY
MAYBE YOU SHOULD TRY USING IT WITH SINGLEPLAYER AND NOT MULTIPLAYER because that is probably the problem... leechers want uber MP chams to own other people...
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I checked into it and apparently its possible to make an x64 dll on win32 but the Tatnium project is for win32 and Im getting to a place where I dont know what Im doing.
https://www.mpgh.net/forum/207-combat...b-azorbix.html
that is the Starterkit that the source code I posted goes with, if you have a compiler set to build x64 dll's it would probably be easier on an x64 machine... if you have the Windows SDK, DirectX SDK (any version really, latest doesnt matter) Visual Studio and copy and paste skills its quite possible.