I purchased a module of 256MB SDRAM for my dell dimension l866r. When I installed it and turned on my computer nothing happened. When I re-install on old RAM it boots right up. Now i'm pretty sure I got the right RAM. I went to crucial.com and it said I needed SDRAM, PC133 • CL=2 • Unbuffered • Non-parity • 133MHz • 3.3V • 32Meg x 64 . The RAM I purchased is SDRAM 32x64 PC133 168 pin. Does anybody know whats going on? Did I miss something?