Dell Poweredge T410 Server Unsupported Memory configuration Detected

I have a dell Poweredge T410 server with one CPU that had 8 gig of memory installed.

All 4 memory slots beside CPU1 had 2 gig of memory installed.

I bought 32 Gig of memory from Dell to replace the 8 gig. (bought 4 x 8 gig)

I installed all 4 8gig memory (SNPP9RN2C/8G 1333mhz PC3L-10600) on package

When I boot the server I see

System Memory Size 24gb, memory speed 1067mhz

Warning:Unsupported memory configuration detected.

Memory configuration is not optimal

the recommended memory configuration is 

CPU1

Slots A1 Dimm A

Slots A4 Blank

Slots A2 Dimm A

Slots A3 Dimm A

Everything I read says I should be able to put 4x8 Gig memory chips in the server, in the slots I put them in.

The Bios version is 1.5.3 if it matters.

Thanks, Any help would be appreciated.