I've tried to render animation using firefly. It takes a while for the AVI to complete (which I expect) and when I view it all I get is a gray screen (I forgot to mention that before)  that lasts as long as the animation was supposed to. I've rendered using preview and I get the animation but missing some of the textures and colors.

When I create a normal render  everything comes out fine. (I render using firefly). These problems only occur when I try to render an animation. I've really become intrigued by the whole animation process and I'd really like to create them. I hope you can help.