so you left it out? ok so when you put it back beeps start? if so then that`ll be the problem.
Now as I said before there are different slots for cards depending on your motherboard theres:
PCI (not likely your card because 2002 is recent)
AGP(could be this but theres different versions which is helpful to know)
PCI - express ( dont think it will be this as wasn't around till after 2002)
If you dont play games then you could get a card very cheap not sure how much in $ but probably about $30-60.
Now im off to bed its 2am here and I have work tomorrow, post back and i`ll reply as soon as I can or someone else will.