DVD won't play

UDF isn't in the file list!!

After I got this error, I am also scared because I installed a association fix for vista, not 7. Did I screw anything up? I installed the 7 fix after but nothing fixed anything

It does play when I right click and select auto play and play it, but I want to be able to double click and play like before!!

OMG!!! I have very slow slow slow transfer rate!!! my disk gets like 15mbs