Hi. My name is***** you for your question and the opportunity to assist. Your
hunch was correct. Each of the memory slots supports no more than 2GB chips.
Here's a link to the motherboard specs:
Look in the Memory Upgrade Information section for the description.
You should be able to exchange the memory for chips that will work with the board.
I know this probably isn't what you wanted to hear but please don't shoot the messenger.