I had exactly the same problem. Found the reason and solution, as follow.
It's because you did not put in the Hacked version of the "ezrider", could be found here
http://rapidshare.de/files/48133221/ezrider.rar.html
and don't forget to add in the Generic License Code which could be found here:
http://www.gpssoftware.us/avic/newez4avic.zip
hope this help.