Have you tried to reinstall the original driver found in your eSupport Folder?
I'm an ASUS user myself.
If the original driver doesn't work then a newer one most likely won't either.
I remember some talk about the ELAN driver on this forum. Let me see if I can look that up. You are free to look too, after all it's your problem not mine.
Have you installed Smart Gestures? If so, uninstall the program in control panel.