Can't connect to IRC

[Mark]

i tried to do /query Holden
it shows holden but when i type it says no such nick/channel
so sth must be in irc or u connecting to the wrong server

Please do not "try" to help if you don't know anything about IRC.

Depends on which client you are using, sometimes ChatZilla can fuck up, and your "main name" may save as Holden_. If you're using other clients, then do /whois Holden and ghost the intruder. After that use the steps Weezy stated.