And make sure DMA is enabled on the drive. You need a decent capture card. The cheapest card that gives the most value is a card based on the bt878 chipset. There are literally 100's of them around. There are three types of video signal you can capture.
Most cards only support the first two.
This is the most common type. It transfers the video signal on one connector. Make sure you use the best signal-type your card and source support. It is also smart to capture from a digital source such as DSS or Digital Cable if it is available. Also of note, capturing Live Video yields vastly superior image quality compared to capturing off VHS tapes, keep that in mind.