Win Avi Error

when i go to converet a movie using Win Avi i get an error that reads " OutDir Can Not Include_" and thats all ti syas, once you click ok the program acts as if it was converting but it always stays at o%, what am i doing wrong, and how can i fix it thank you

Just reselect the output directory. Be sure that there is no "_" included in the directory!
Maybe you can have a look at http://www.winavi.com/en/support/faq/faq_converter_63.htm