If the other teams are working correctly, then there's nothing in your profile to indicate that the DK team wouldn't perform in the same manner. Are you certain your settings are at the lowest? Have you tried cycling them from high to low? It's possible for them to get turned up, but look as if they're not. Also, if you're using only the slider to adjust your settings, then the slider doesn't adjust MSAA or SSAA (render scale).