I'm tired of people asking me how to do this so I'm making this thread..
Click on connection --> Connect --> And you will see this
Label:
Server Address:
Nickname:
[]Allow Server to Assign a Nickname <--(Not checked)
()Anonymous () Registered
Login Name:
User Password:
Auto-Reconnect:
Etc...
Fill in everything and leave the Registered thing not checked/circled.. Then when your done click connect..