Web Form Submission Macro Code

Filling in a webform using the code below, works fine until I add a bit to set a Value to a field name that comes from a Radio Button. I'm presuming its because it doesn't actually select the Radio Button (as seen when I step through, you can see all the other values/fields update). Updates the page with all the other values correctly updated except for changing the Park Status.

With WebBrowser1
.Navigate NMCURL
Do While .Busy: DoEvents: Loop
Do While .ReadyState <> 4: DoEvents: Loop
With .Document.forms("CFForm_1")
.PageAction.Value = "Enter"
.SelectedCallID.Value = TicketNo
.lastactionby.Value = UserName
.ActionType.Value = ActionType
.Description.Value = Description...................