DVD writer draw keeps popping open (Sony VAIO VGN-S5XP)

[qanda]This thread is about the Sony VAIO VGN-S5XP. Click here to see full specs[/qanda]The dvd writer draw on my Sony Vaio VGN S4M?5 keeps popping open while I’m burining CDs - anyone had this before? Could it be teh brand of discs?