An admin has just responded to your ticket so please check your e-mail for the update. It appeared that your DNS records weren't pointed to us, you can use the hostname the admin just created for now: mysql.belcantostl.dreamhosters.com
That hostname won't be working for a few hours though, due to DNS propagation.
That hostname is also interchangeable with your current database, so you can login there as well.
There are further instructions and information in the admins response to your ticket. If you have any further questions please reply to the e-mail.
Have a great day!