|To expand a little on what kuwese asked....if you don't have the 64-bit version of XP, this RAM upgrade is a waste of time. The 32-bit version of XP will never be able to take full advantage of it. Even if you were to get it to work correctly, it's doubtful you would see any improvement in performance.|
The beeping indicates that you either bought incompatible RAM or you didn't have it fully seated in the RAM slots. Does the new memory match the old memory specs exactly? I'm guessing the old RAM is DDR2-667?
What was the intended purpose of this RAM upgrade?