Interesting Problem

[shakey]

Ever since installing the latest Plan of Attack Beta, I have been unable to host any Source based games. I can still host Sven Co-Op, DoD and any other games built on the Half-Life Engine, but when I host CSS or HL2DM (or any third party mods), people that try to join get a message saying it is a LAN Server. The strange thing is, that if I use Source Dedicated Server I can host CSS fine.

I deleted PoA from my computer, but have still been experiencing the problem. Any ideas what it could be?