Detlaxe,please check if UDP protocol is not blocked in your firewall. Other than most internet applications, AChat uses that protocol...
Im starting to wonder if it isn't a firewall problem. Im not very tech savvy but I do understand enough to change the settings of the firewall, like you have suggested. I am going to wait a while and perhaps it will fix itself... yeah i know, not likely, but im not sure what else to do. Thanks for your help though!