Need help on radio buttons

I have added three radio buttons to one of my items the problem I have got is they have all been clicked I do not want any of them to be clicked unless the customer clicks them can anybody help me out to convert this problem thank you in advance this is a link to the item http://www.youtofriends.com/index.php?main_page=product_info&cPath=9&products_id=11

Sorry I got it wrong I wasn't adding radio buttons I was adding a drop down menu for some strange reason they have changed to radio buttons can anybody help me with this lot.

As I suspected, you have actually added three different option names each with one choice, instead of your intention to have one option with three possible choices.

You need to create in Option Name Manager an option called Colour.
In Option Values Manager, select Colour and add a value Green to it; then select it again and add another value Red, and another value Blue.
Now you can add attributes to your product in Attributes Controller. Click the option name Colour and the option value Green, and add this as an attribute. Repeat for the other colors.

Thank you for that (gjh42) they should make an FAQ for this