GMod returning to main menu when trying to host game.

[BOP]

Whenever I try to host a game through the "Create Multiplayer" option, it loads all the way to about the last 2 bars, then it just reverts to my GMod main menu. Single Player works fine though. Any help would be appreciated.

[AtomiCel]

check your console

[BOP]

[QUOTE=AtomiCel;16878814]check your console[/QUOTE]

For what?

[AlfieSR]

[QUOTE=BOP;16883737]For what?[/QUOTE]

Any errors, that'll tell us what's wrong.