I've already put my friend's Hamachi IP address in my ppsspp.ini, but when I go to the Online Gathering Hall it still says Communication Error. 
I went back to the .ini file and changed the IP back to localhost and I could enter the Online Gathering Hall just fine.
Also, when I go to command prompt and check my IP, I don't have an IP given by hamachi. When I check network connections, the hamachi adapter is still acquiring network address.
I guess the real problem is in my hamachi, but I already installed a new one.
OK, we finally got it to work! I just set the hamachi to static IP in network connections. Thanks to all who helped

I went back to the .ini file and changed the IP back to localhost and I could enter the Online Gathering Hall just fine.
Also, when I go to command prompt and check my IP, I don't have an IP given by hamachi. When I check network connections, the hamachi adapter is still acquiring network address.
I guess the real problem is in my hamachi, but I already installed a new one.

OK, we finally got it to work! I just set the hamachi to static IP in network connections. Thanks to all who helped

