H) Visual C++ for version 3.91 onwards.

Version 3.91 of Toribash requires that your visual C++ framework be up to date, if you find that you can load freeplay, but not multiplayer, and older versions of Toribash work, then this is probably the issue stopping Toribash from working.
To fix this problem just go to the VC++ 2010 download page, download the framework and install.
For x86 (32bit) systems only: http://www.microsoft.com/downloads/e...3-37bf0912db84
For x64 (64bit) systems only: http://www.microsoft.com/downloads/e...F-9350143D5867
Note that this solution is windows only.