Asp.net radio buttons group

[vova12]

Hello,

I am trying to use group of four asp.net radio buttons and reset the
checked value to true for the first radio button in the group, setting
the Radiobutton1.Checked = True.
But it not seems to work by some reason. When some button on the
form(button "Clear")clicked, the selected radiobutton
(RadioButton1.Checked=True) should be selected, but instead, the
previously selected radiobutton stay selected,not to the first.

Is anybody have some solution to that. Am I missing something here?

Any help will be appritiated.

Peter