I can connect to Machub, etc, but any time that I search something, nothing happens, and I can't directly connect to any user. Any ideas?

Works for me. Have you tried setting your firewall to passive?

are you connected you the internet plug in your room?
If your in the study room or anywhere else for that matter, it doesn't work.
At least thats what I've seen so far

Passive works! I just didn't want to try that mode yet because I had used the other modes in the past and they worked fine...