ImgBurn program in DVDflick not working!!

I'm trying to burn a DVD using DVDFlick 1.3.0.7, but it seems the ImGBurn program that is automatically installed with it is not working. When I go to project settings under "Burning", the check box "Burn project to disc" is disabled. This prevents my DVD from being burned after the encoding process. How can I enable the check box? I have tried uninstalling DVD flick and then reinstalling it..I get the same issue. I have tried burning my dvd by installing IMGBurn separately and then burning my dvd that way, but that did not work either. I would prefer to do everything using DVDflick anyway. Please help if you know how to enable the "Burn project to disc" checkbox! Thanks.