Problem adding memory

[bubbamura]

I have been trying to add more memory to my system but not having any luck. I currently have 2 sticks of pc3200/512mb and want to add another 1gig stick but am having problems with it working. I have to press re-set after starting my computer in order for it to boot. I have tried removing the existing memory and only use the the 1gig stick but get the same results. I also tried a high-density stick with the same results, was able to swap that for a low density stick that was supposed to be compatible with all mobo's. Same results. Tried the same thing a year ago with another 512mb stick, same results. The 2 sticks that work great are both different manufacturers, so doesn't seem to be a problem in that regards.
Here are my specs:
p4 2.4 gig processor
via p4pb 400-l mobo
via apollo px400 chipset (vt8754 & vt8235)
ati 9600pro video card

Any help/suggestions?

 

[Liquidlen]

All Mb's have specific configurations as to which slots are to be used with different numbers of sticks of Ram. Also it is best to use the recommended (tested)brand /type of Ram .
Go to the Website and confirm this info
It is never a good idea to mix different sticks , and generic ram is like shooting dice.

 

[vegasgmc]

Some older motherboards wont run with more then 1 gig of RAM and some need a BIOS update to do it.