Proliant DL580 G7 New RAM issue

Hello all.  I'm trying to upgrade the RAM in my Proliant DL580 G7 server.  I'm replace the 4gb 10600 1.5v sticks with 16gb 10600 1.35v sticks (HP 632204-001).

When I replace them, i get a long beep and no POST.  I've included a screenshot of the front health panel.

I've tried just 1/2 the sticks, and then swapped with the other 1/2.  So i don't think it's a bad DIMM. 

I've also tried updating the BIOS, but still see the same issue.  Does anyone have any suggestions for next steps? 

Thanks.