A8N-SLI Deluxe compatiable memory

[plugger]

:disgust: After purchasing the A8N-SLI Deluxe mobo and Corsair XMS CMX 1024RE-3200 registered unbuffered memory modules (4GB), 400MHz, & 3.3.3.8 timings, I find that my mobo will not POST due to memory pack error. User manual states that Ecc & non Ecc modules will work in this mobo. Is there a chance I can get this memory to work or will I have to excange it for plain unbuffered non Ecc memory. I'm somewhat new to memory configurations and timings. Has anyone out there encountered this problem?