I see you have the correct nameservers added at the domain registry.
Have you added the actual domain to your account using the Control Panel via this link.
Then add your domain via the add a new domain option.
If you have done all this you may need to contact Support from the Control Panel support section.
Opinions are my own views, not DreamHosts'.
I am NOT a DreamHost employee OK! :@
Act on my advice at your own risk!