Selecting a Radio button

Hi,

Im having problem with radio button with onchange attribute. When a radiobutton is selected, page seems to reload and a dropdown control will appear. But result of my script shows that the dropdown did not appear. Based on the screenshot that was produce by webtest report, the control did not show up. I have used verifyRadioButton to test if radio button is actually selected and result shows passed.

This is how the html tag looks like on initial load of page.

<input type="radio" name="RadioGroup" value="radio1" onchange="" id="R__Id">

Here is my webtest code

<setRadioButton description="Check radio button RadioGroup: radio1" name="RadioGroup" value="radio1"/>


Thanks,
Marlon