Okay, I got past the username problem . . . however, I have a new connection to the database problem:

same stop sign as before, except now it says:

Connection to Database failed
Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

I emailed my host (again, OpenSourceHost) but figured I would post here in case anyone here had the solution first.

Thank you again for your help.