Yeah, that was it.
I have another question for you... I've noticed that at some resolutions, when you start a ROM it keeps the same resolution as the layout.lay file (ex. classic 640 x 480), even if I have the resolution set differently in the ini folder in Mame. The thing is, this doesn't happen when I use Mame outside of the Mamewah front end. I'm using a regular TV currently and a Radeon 9200. What should I do to use the resolution that I designated in the ini folder with Mamewah?