The best advice is: return the board if you can, and buy another one from other manufacturer.
DP67BG has several problems, Intel seems to be aware but never fixes them, and each BIOS update is worse than the previous one.
Yes, it's sad but I've regretted buying this mobo almost as soon as I bought it. At the time I was under the impression that intel was a safe bet. How quickly that has changed after a couple of days on a few different forums.