getting data from a database based on a selected radio button

Question

I am trying to get the seleted radioButton from a group of radio buttons. The program is supposed to check on the database for controls that match the selected radiobuttons. The radiobuttons are named High,Medium,Low. For example If a person selects High, the program must go through the database and choose all the controls that are rated High and then must load them into a listBox. My problem is that the code i am using does not see the selected items and does not load the listBox. I am usig SQL server database and stored procedures to do this. Any suggestions on how i can go about doing this will be appreciated.