Sorry, looking closer, you also have an 845 Intel chipset. This is old and there are no Windows 7 specific graphics drivers for this, so our software cannot use it. The latest Intel graphics card with Windows 7 drivers is the 945 chipset I think.
I expect you are seeing this error:
http://kb.displaylink.com/293
I'm afraid the only solution is to add a Windows 7 graphics card that has WDDM drivers, otherwise DisplayLink software will not be compatible with this system.
Wim