What interface are you using? If anything is on the FW bus, note that this:
FireWire/1394 Controller 2 : ASUS VIA VT6308 1394 OHCI Controller
VIA firewire controllers are historically bad for recording in general, and worse with Pro Tools. Consider making this disabled under Device Manager
Beyond that, there are several system tweaks that need to be done and your help files or Getting Started Guide should explain them well enough to guide you thru getting settings correct.
Still deeper; I don't know if the motherboard's chipset is a compatible one(Mainboard : ASUS P7P55D-E). Socket 1155 and 1156 are not as universally compatible as are socket 1366(x58 chipset0 and 2011(x79 chipset). Hopefully someone else may use this same motherboard and will have more insight