Hi. I have to get to bed... brain's not working anymore.

My host migrated my site from one server to another. it was supposed to be "seamless". All I get is the "can't connect to database" error. Was hoping you guys could give me some things to check in the morning. I went into cpanel and checked that the database was there. its the exact same size as it was on the old server. "check db" says its OK. Users are the same as before, passwords are the same as before. Anything I'm missing?