help me pls

Hiiii
I have a 4story private server, but i cant log in :S , my friend can but im the hoster and i cant. Can someone help me? pls

More detail , and put images ;)

I would say check your account information: D

Check Firewall is disabled
you can login ?
if you can't login maybe db no is configuration correctly or client no is good
please add more details:D