You should include first:
A simple, one sentence description of the project.
What the program will do.
Why you believe this project is important. (Example: If you did a database of book reviews: this was important because it encourages kids to read more... etc...)
What language you are using.
You should have a list of objectives and outcomes, who these objectives are targetted at, the audience your project is aimed at.
You will need to include the name and details of your client, and if they have any specific needs for the project, then you should include these.
Don't get confused with a feasibility study - you will do one of these later. Thus for the proposal, you shouldn't need to include budgetary, technical, time-frame stuff...
Edit: Sweet! Executive member status!