How to set the selectedindex property of the Radcombox >>see description

[Imtiaz-QA]

In my application i have 5 or 6 radcombobox on a page.i have create the description for the radcombobox like that

Code:

set statusdesc=Description.Create
statusdesc("micclass").value ="RadComboBox"
statusdesc("class").value="RadComboBox RadComboBox_WebBlue "
set statobj=Browser("test").Page("test").WebTable("testing ").ChildObjects(statusdesc)

then in a loop i want to set the index 2 for all the return objects

Code:

For j=0 to statobj.count-1
statobj(j).Highlight
statobj(j).selectedindex=2
Next

an error like function or property is not supported by the object comes when selectedindex statement executed.