ProLiant ML10 E3 memory upgrade

Hi,

I just bought the ML10 E3 1220v2 server, but I came with 4GB of RAM. So I bought this for it: Kingston HyperX FURY White 16GB (2x8GB), DDR3, 1600MHz, CL10, 1.5V.

But when I plug in the memories, it doesn't start. I read on the user guide and it should support until 32GB.

Could you please help me finding out what am i doing wrong?

Thanks!