Is that an "PRT SC" screen shot? or an ALT-S screen capture? If alt-s I would think it may be a software issue, but I'm no positive.
I don't know about that particular graphics card and how well it typically runs with AH (I'm personally an NVIDIA guy) but you might try updating drivers (download them from the manufacturer's website, don't use the ones that came on the disk with the card.. as those are typically outdated). If that doesn't work, or if there are no newer drivers available, you might actually try OLDER drivers.. sometimes they release new features that aren't compatible with AH2.
You might also try enabling or disabling some of the different video options from the offline menu.
Good luck.
*EDIT* one other thing you might consider is upgrading your power supply. I've heard these newer cards suck a lot of power, and if you PS isn't good enough, goofy things can happen. Goodluck.