Radio Button Do Not Check When Clicked In Internet Explorer

Hi Guys,
I have dynamically changed my form elements when the user clicks on a link.When the input elements changes,you can type into the text boxes and you can also select an option from the select elements,but in Internet Explorer you can't select the radio buttons.When i click it,it doesn't select.It works fine in Netscape but not in IE.
I used the W3C methods to dynaùically do the changes: document.createTextNode(),document.createElement(), document.appendChild() and those kind of methods.
The radio buttons can be checked in Netscape but not in Internet Explorer

Thanks guys
Need Help.