I bought some new RAM to expand to the full capacity for my pc which is only 512mb. I have 384mb installed at the moment so i bought a 256mb stick to replace 128mb. When i fitted it it only showed 256mb so i swapped them over but it still only showed 256mb. I phoned the site that i purchased it from, they sounded surprised that it didn't work but sent me another 256mb stick free of charge. This 1 was made by Kingston, the same as the working stick installed so i thought maybe that would work but still nothing. I tried the 2 new sticks together and the computer didn't come on at all. I ordered the PC133 256mb SDRAM as recommended by the Crucial Memory Checker, is there anything i can do to get the RAM to work is it likely i have been sold duds? Thanks for any help