Hi-
https://help.ubuntu.com/community/Firebird2.1/On/Ubuntu
For anyone wanting to know what went wrong with classic server, this link has similar instructions to what helped me get running with superserver.
I think part of my problem is that I didn't have this link when I was trying to get classic running and didn't know these steps would help me. Firebird maybe changed a little.
I think this link will help you get either the classic or superserver running.
thanks