My Created Fixtures in 3d Visualizer

Hi there, I just started using MyDMX to control my lights so i'm totally new to this! When I first went to set up my par cans they weren't available in the list of fixtures so I decided I would have to make them myself. By the way i'm using 14 HTL(High Tech Lighting) Par 64's. So anyway, I created the fixtures and when I hook up the interface my lights work just fine, the problem is that in the 3d visualizer I can't get the fixtures to do anything. (They don't even have light beams) I would love to be able to simply program everything and make sure it works the way that it should on the visualizer but I don't want to waste my time programing a bunch of steps if i'm ultimately going to have to redo the fixtures or something. So anyway that's why i'm here for help! Thanks for any and all help!