Junior, you seem to be having the same problem that I do. I can change all my OC settings except for the FSB. When I change the FSB under or over the stock voltage (333 in my case) the board will do a double boot and start with the stock voltage. I can change memory timings and everything just fine.
I haven't found a solution to this problem, so I'm just over clocking using EasyTune5 through windows. This certainly isn't the best solution, but gets the job done for now.