I'm firmilar with cPanel's syntax for MySQL databases, such as instead of databasename, username_databasename. Does Plesk have a similar way of formatting things?

I just got Plesk 8.1 up and running (finally), and trying to install ModernBill 5.1 but it seems to be having problems connecting to MySQL, double and tripple checked everything and thats pretty much the last thing I can think of.

Connection Test 1? mysql connection OK.
Connection Test 2? dbname connection NOT OK.