Ahem, did you just call JAzz 2 crappy....

How DARE you!!!!!!!!!!1

Anyway, I have this problem too. I don't know any other reason for you to have this problem other than having a router.

Check how your computers are stringed together through the network, or if you're sure you don't have one, then I don't know. According to KRSplat...

When you have a router, you have to open up ports 10052-10056 to host or not time out. If you host, the serverlist will show your server as pinging forever. If you join, you will time out.

Hope that helps