Problems installing Nvidia Geforce 6200 agp graphics card

[mg33]

Today I bought a Geforce 6200 graphics card because my computer met all the requirements. When I installed in my computer and turned the power on there was a beeping noise and the computer screen was black. I don't know what I did wrong. My guess is my computer is not compatible or somethings up with the card or dirvers, I really don't know since this is my first time installing a graphics card. The requirements of this graphics card is: petium 4/III/II/celeron, AMD K6/Athlon. An Agp 8x or 4x motherboard. 256mb of memory at least. windows xp. a minimum of 250w power supply.
I have a AMD Sempron 3100+ 1.8ghz, an agp slot 3.0, 8x. a 250watt power supply. and windows xp. If you could help me out in any way I'll be very greatful. Thank you for your time.

 

[kimsland]

Power cable out
Push in the on switch (releasing all internal voltage)
Touch the frame of the computer (inside - and don't shuffle your feet -antistatic issue)
Take the card back out
Boot up with original onboard video
Go to system bios
Confirm 1st startup set to AGP
Change the meg to 256
Save and exit
Turn off the computer
Reseat the AGP card (push in securely - goes in a long way)
Put the monitor back to the AGP
Power cable back in
Turn back on