The other night i went out and bought a 2nd monitor. I have 2 19" Philips CRT monitors now. I went to plug the 2nd one into the back of my computer but the DVI-to-VGA cord did not fit into the 2nd slot. The first one fit fine, so 1 monitor works. For the 2nd slot, the slot was larger than the adapter plug. What do i need to get to make this work now? Do I need an DVI-to-ADC adapter? I called apple but the person i talked to didnt have any idea what i was talking about