ok gmod servers being weird

okay me and my friends have tried to make servers on gmod but when it connects gmod freezes then crashes this happens to all 3 of us anyway ideas? :v:

You need to be a lot more descriptive than that in order for us to assist you.

well after it finishes loading muiltiplayer 1 second later then it says :HL2.exe has crashed

[editline]10th July 2011[/editline]

and it happends to my friends to (we live in the same area)

[editline]10th July 2011[/editline]

so ideas?