So I got these new ROTOSOUND swing 66 strings. I love the tone, but I seem to have a very annoying problem. During band practice, the bridge gives out and collapses under the A string (80 gauge) and it sounds like I'm strumming a dying chicken. My bridge looks like this http://www.fender.com/products/prod_images/accessories/0055257000_xl.jpg (Fender bridge) and I just can't figure why it keeps dropping out. I've adjusted the action and tried to restring the bass multiple times, and can't figure it out. The bass itself, for those who are wondering, is a Fender Deluxe Special P bass. Thanks.