how do I update the path for MT?

My blog (for which I use Movable Type) has been moved to a new server, and now when I try to make posts, I get the following error message:

>"Error making path
>'/home/.festus/derfner/joelderfner.com/blog/2009/10': mkdir
>/home/.festus: Permission denied at lib/MT/FileMgr/ Local.pm line >105"

I wrote DreamHost about this and they said:

>The path there, is no longer valid. You'll need to update the path
>there, so that instead of:
>
>/home/.festus/derfner/joelderfner.com/blog/2009/10
>
>you have:
>
>/home/derfner/joelderfner.com/blog/2009/10
>
>The .festus directory is left over from the old server, and should
>never be used.

But the thing is, I have no idea how to do this, and DreamHost doesn't support third-party applications.

Can anybody help me fix this? I'm going crazy not being able to share my every thought with the entire world.

Look for a config.php file in your FTP directory, or if you can get to the Admin interface for MT, see if there are some Path options.

-Scott