I'm at a loss..

I've successfully installed my purchased ListPro 5 on my PC but cannot get the program to my mobile device. (700wx)

Upon install ListPro says that the "next time the device is connected" the program will be installed on the device but everytime I sync- the program never installs on it.

I just tried now to drag and drop the ListPro program into "TREO-My Documents" folder and sync'd but when trying to run the program on the device got a "not a valid pocket PC app"

Can anyone help?