Multiplayer: Network Unavailable

[ÜberJumper]

If you are getting a "Network Unavailable" error message when starting a Multiplayer Game (LAN, Gamespy or TCP/IP), then you may need to re-install DirectX 9.0b.

To confirm if this is the problem, go to Start>Run ... type DXDIAG and hit enter. In the Direct X Diagnostic tool, check the network tab for errors.

Another fix from Void998:

If you run dxdiag and see that you've got all the correct files, but you are missing registry keys try this:

Go to a command prompt:
type the following:

regsvr32 dpnet.dll

(dpnet.dll is directplay basically)

this should register directplay on your machine.

This worked for me on WinXP Pro, I know it'd work on NT, but I'm not too sure about previous windows versions.

If you've got corrupted registry keys, try the following from a command prompt:

regsvr32 /u dpnet.dll
regsvr32 dpnet.dll

(I think it's /u, it might be -u).

This will unregister the dll, and then reregister it.