Can you please provide us with much more info. This FAQ Entry would be a good place to start: http://forums.adobe.com/message/4587299#4587299
It might also be useful to posting a screen-cap of your Image, with the Layers Palette open and visible.
I am embarrassed! I selected the rectangle tool instead of the gradient tool. They are both rectangle. Thank you SOOOO much for trying to help a beginner with a school assignment.
Hey, no problem. Many of us have grabbed the wrong Tool from the Toolbox. Stuff happens.
Glad that you found out the issue, and are up and editing.