dolphin svn r2742 starts but won't play pal brawl

[cowtiki]

as the subject says, dolphin starts up but won't play the pal version of brawl. when i load the ntsc version,i at least get the insert disk error. a lot of other people somehow got brawl to at least boot. what will happen is i will start up, and then a black screen will stay with the fps frozen at one number