I had that board for about a week and swiftly sold it on eBay due to overall flakyness. Did you install ALL the drivers for the chipset? Download the drivers for the M1535D+ southbridge of the chipset on that board. This is likely where you may be getting a problem from. ALi's site is linked below. The chipset on that board is the ALi Magik 1. Like I said... get the drivers for the M1535D+ chip, and then also the M1647 northbridge chip.
http://www.ali.com.tw/