Hello Old pc builder but new to OC'ing

My pc is i7 2600k
z68 extreme 7 gen 3
16 gig gskill F3-17000CL11Q-16BXL
580 gtx MSI lightning GPU
850 watt Platimax PSU
180 Corsair Force 3 SSD
2 TB WD black caviar HD

I cant seem to get all 16 gig of my ram in the board I get error code 45 when ever I populate b1/b2 slots tried different pairs in the A1/a2 slots boot fine. So the person a few pages back was using the same ram for his build I was wondering if he could pass alon his settings or if anyone knows best settings for this ram if said person could post them here. I have tried the 11-11-11 -30 @ 1.60 ,manual and xmp profile. I'm stumped do I oc the cpu to accept the other 8 gig or could it be bad ram slots.....Help