Permalinks issue.. We think.

When uploading an audio file to the server as a blog user.

The file uploads fine but gives the incorrect url to the file

If gives the file name i.e. http://subdomain.domain-name.com/files/2009/04/filename.mp3

But the real location of the file is the follow http://domain-name.com/wp-content/blogs.dir/2/files/2009/04/filename.mp3

Any ideas how to fix this?