1.make sure you have installed the codec for [url=http://www.winavi.com/rm-converter.htm]RM[/url] and [url=http://www.winavi.com/avi-to-dvd.htm]AVI[/url].
2.Make sure the original file can be played on your pc.
3.uninstall completely and reinstall the program.
4.contact with support@winavi.com,they can help you.
