connecting to the database on yahoo server

My hosting service is Yahoo. I created a database on the server and tried to connect to it in Dreamweaver. When I went to connect it gave me an error message that read " HTTP error code 400 bad request". My information is correct and the database is able to be connected to b/c I wrote a php script to test the connection and it worked. I need to be able to connect to the database from Dreamweaver inorder to create any of my search pages. I would appreciate any and all help!