VMWare tools ESX 4 for Windows 7 x64

I'm trying to install VMWare tools for Windows 7 x64 on ESX 4. The OS installed just fine, but when I try to load the tools I get almost all of the way there and then get the error:

Error: 25030. Setup failed to load a kernel driver (vmrawdsk). Clicking okay rolls back the install.

I even copied the files directly to the desktop and ran them from there.

Thanks