Every time I press Multiplayer from the menu, toribash crashes. I can go to rooms by writing /jo aikido7, but I want to join other ones too. What can I do? BTW, my computer is 64-bit

Point G in this guide is worth reading. If it doesn't fix it, please post the contents of your stderr.txt, located in the Toribash folder.

set_regedit_key : failed to open .rpl (5)
set_regedit_key : failed to open Toribash.Replay (5)
set_regedit_key : failed to open Toribash.Replay\DefaultIcon (5)
set_regedit_key : failed to open Toribash.Replay\Shell\open\command (5)

Its a new 64bit computer

Yes, I know it's a 64bit computer now. Have you tried the guide I linked in the previous post?

The diskdrive is up to date, i downloaded that c+++ thing, still, multiplayer crashes