hi there, i have a gateway mx3225 laptop runnin xp it came with 256MB ram stick in it, i looked up the max ram that i can use and everything showed 1GB so i bought a stick, but when i install it, nothing will run on my comp. the power light comes on, but that is all....... i had a 256mb so-dimm 200 pin DDR2 533 mhz pc-2 4200 stick in it, and i bought a 1GB so- dimm ddr2 pc2-5300 667mhz, which on the package showed would interchange. the guy at the store even pulled up my comp specs to make sure it would work. any info would be greatly appreciated.