Radio Button Problems

Hey,
i tried to create a product meta field with some radio buttons.
The problem: The plugin dosen’t group them.
In the html-code you can see the attribute “name”, but it dosen’t have a value.

I tried to solve the problem with this jQuery-Script:

jQuery(“.nm-productmeta-box input[type=’radio’]”).attr(“name”, “color”);

With this script the radio buttons are grouped, but you can’t click the “add to cart”-button anymore. I don’t know why.

Hope you can help me ??
Marvin