Prassi primo problem?

just updated pc and reinstalled prassi but the problem i am having is it will not let me do a disc to disc copy were it did before it starts spin test then initilizes then spits the disc out and says disc copy complete but there is nothing at all on the disc ive checked options and the box that says allow disc to disc copies is checked please help with this or if you cant let me know what is the best program to use for xbox/dvd backups

thanx longy…:bow: