my computer runs on a 512 MB PC2700 DDR 333 MHz. i was planning on upgrading the computer to 1 gb of ram, so i bought a 512 MB PC3200 DDR 400 MHz because i found out that the PC3200 is backwards compatible with the PC2700. however when i installed the PC3200, my computer did not recognize the new hardware. is it because of the difference between the 333 mhz of the PC2700 and the 400 mhz of the PC3200? is there anyway to get it to work and run 1 gb of ram?