h61m-s

Foxconn H61M-S has 4 ram slots but 2 of them are not working I updated the bios(C52F1P03) also still same A1,B1 working A2,B2 not working anyone pls help me

Foxconn H61M-S BIOS C52F1P03 Mainstream segement MB, support LGA1155 for Intel®Ivybirdge/Sandybridge processors Support dual channel 4 DIMMs DDR3 memory up to 16GB at 1600(IVB)/1333/1066 SATAII / SATAIII controller integrated Support VGA, DVI and HDMI interface Support 2* USB 3.0 ports...