ive just invested in a new pioneer 105 dvd-r burner. But as usual with me i have a problem! Whenever i put a disc into either the new drive, or my existing dvd rom drive, and try to open it, it just locks up, and no amount of waiting will make it work. But, the moment i eject this disc, the whole computer will work again. Ive no idea why this is happening. The only software i am using is record now max. any ideas whats up with my machine?