Populating oracle db data for radio button on the view

Hi,

I am trying to populate data from oracle database table and all text
fields and text areas work fine. But radio buttons does not get
populated.

For example,

<%= radio_button("attending_ip", 'service', 'NBU') %>NBU<BR>
<%= radio_button("attending_ip", 'service', 'GI' ) %>GI<BR>
<%= radio_button("attending_ip", 'service', 'Reh' ) %>Rehab<BR>

However, on the view, if I select any radio button(from empty radio
buttons) and click edit link again, it gets populated. So, it looks
like it is not working with data that were already in the DB table.

Has anyone experienced this before?

Thanks,