Cannot update wordpress, cannot install plugins

I don’t know if i have any control on my domain, reason, i cannot upgrade it to WP 3.0
everytime it asks for username, host password

i don’t know database password. Can you please provide it so that there can be some decent blogging.
Thank you

It sounds like you’re using the pre-installed Apps configuration here which is not user-upgradeable. Now that 3.0 is officially out, it’ll take a little while for it to show up on the servers here.

But i cannot install any plugin or theme. can’t i get the password to make a database connection.

That’s right. You can’t add (or update) any components of an Apps installation. That’s a “feature.” It’s maintenance-free for the user since DH handles these updates. I much prefer to handle my own installation and don’t mind doing the maintenance.