Server transfer causes uploader to fail

I was developing a site on my own server because my client hadn’t yet gotten their own. When they did get their own server I migrated the wordpress install using the instructions here http://codex.wordpress.org/Moving_WordPress#Moving_WordPress_to_a_New_Server (followed the instructions for ‘don’t care if my old blog works’).

Everything seems to be working fine except for the file uploader. When I try to upload I receive the error message:

Unable to create directory /home/jango7/public_html/clients/colver/wordpress/wp-content/uploads/2009/07. Is its parent directory writable by the server?

/home/jango_7/public_html/clients/colver/wordpress refers to the directory structure of the old server, so it seems there is some remnant of the old server left in the database.

Can anyone explain a way to manually update the record that tells the uploader where to deposit files, or suggest another solution?

Thanks.