rats

I play on a windows 7 laptop, sometimes with people playing on macs, we rarely finish a game because it crashes. Below are the examples of the various crashes we get: - A pop up box appears saying 'Tiberian Sun has encountered a problem and cannot continue' - A box comes up saying 'Reconnection Error' - One persons game just freezes and they can see everything moving but can't click/ do anything (minimising doesn't work) Help with any of these issues would be greatly appreciated, at the moment we rarely manage to finish a game. Thanks