Kernal panic issue after Memory upgrade in Imac G5

Hi,

I need a little help understanding an issue: I am in the process of upgrading my Imac G5 2.0 20"(ALS) Original RAM was 512MB I am upgrading to the Maximum 2GB.

I bought a pair of new 1GB sticks (2GB kit) from Crucial.com. I am having problems with kernal panic messages during start up ONLY when both sticks are installed. I can run either stick in either slot by itself without issue. But Not both at the same time. I spoke with a tech rep at Crucial who said, I have one of 2 issues. He said, Its either a mis-match issue with the new sticks or I have a bad logic board. I question as to whether the logic board is the problem since I have NO issues with the computer operating other than with this memory upgrade. At the moment Crucial has sent out a new pair of Memory sticks for me to try. But If that doesn't do the trick then he says I should take my computer to a MAC servicer for diagnosis. Does this make sense that its a logic board issue.

Thanks

Dennis