Hi Arthur, I think I've found the problem. The example you sent me works fine. But i tried the following:
The attribute that triggers the function stays in page 1
I've created a second page
I moved the radio group to the second page.
The code performs but the option is never selected.
I think this is the problem, because then i tried the same in my real form, that has 3 pages. The first for searching and performing SOAP querys. And the second and third page with information results presented to final user. In this condition the problem is that you can't modify the selection of a radio group that is not in the current active page. Now im trying to figure out how to workaround this problem, or present this as an issue and a bug to support CA. If you have any idea to workaround this problem, i will be very thankfull.