I just got a new Compaq computer with an on-board video. It also has an AGP slot. On my previous machine I had a nice AGP video card, so I wanted to place that into the new machine. However, the video card physically does not fit into the new AGP slot. The part that sticks out by a couple millimeters is that short plastic piece that has no wires/contacts on it. What do I do? Why wouldn't the card just fit?