I am using a MacBook Pro with Mac OS X 10.4.11. Recently, I started my computer to find that my volume buttons don't work. With a bit of testing, I found that the keys work just fine, the volume was the problem. So, I went to the System preferences, and every time I opened the 'Sound' pane, the application quit, and asked me if I want to send and error report. I then tried to create a keyboard shortcut, but that pane didn't work either. I've tried deleting the com.apple.systempreferences.plist file, and that doesn't work. I've tried everything, from repairing my permissions, to restarting while holding cmd+option+o+p at startup. Please help me!!