Roundcube Issues

I have Roundcube installed and working ( but none of the addresses at can be logged in. I can use the server to login to any other email address I want (even on other Dreamhost domains) but none of the shredmill addresses are working. Does anyone have any clue why this might be?

I’ve managed to fix this by setting the create_new_user to false.

However, now I’m wondering how to get the disk space usage meter on the bottom of the inbox to be accurate. Any clues?