Itcould simply be a compatibility issue with the memory. Some brands or types of memory do not work with some systems which is normally why you would want to play it safe and use the memory that Crucial says works on that particular motherboard..
Yes, you will pay more for it but it will work. I tried looking up the same specified memory.
Some brands are more compatible than others as well. Kingston and crucial are two of the better more compatible.
On Cruciaal's memory finder you type in the computer name and model aand it will tell you which of their memory will work with that.
Yep, its sometimes a PITA working on one of these older computers but I think the problem is the memory you got is not compatible with the motherboard..
That's my opinion.
ZIM, what you think?