Hey all, I just registered to these forums, I know some about computers but not experts like alot of you are, I thought maybe I could find some help here. Ok, I use a P3 866 Mhz computer the motherboard only has 2 ram slots, there used to be a 128mb stick in each slot, but I wanted to upgrade so I bought a stick of 256 and put it in the 2nd slot, and then I put the remaining 128 stick in the first slot, but when I power on my PC I get 3 beeps a short beep a long beep and a short beep and a keyboard light flashes on and off, now my pc only works when nothing is in that first RAM slot, so im stuckw ith 256 :/ any ideas? ive tried putting different rtypes of ram in the first slot I even took the 256 stick out of second slot and put it in first slot without anything in second slot, same problem it seems whenever anything is in that slot my pc wont start up, ive been going mad plz help !