Help! I can't get serious sam hd the first encounter to work

[elegyrocks]

I can't seem to get co-op working at all. Does any one have any tips on what I may be doing wrong?

[Wootman]

Error please

[elegyrocks]

[QUOTE=Wootman;25099950]Error please[/QUOTE]

When I try to search for games it says there aren't any and when I try to connect to a friends game it says I cannot connect to the host.