Radio Button Checked not checking

Judging by the code you posted, something in the missing code must be wronge. I put your code in a jsfiddle (1) and it works like a charm.

According to w3schools, checked="checked" is correct (http://www.w3schools.com/TAGS/att_input_checked.asp). I often use <input type="radio" "name="foo" checked />, which also works.

More infos about the site would be helpful.