vb.net in InDesign Scripting - Grouping TextFrames

Question

I want to group textframes in my InDesign CS3 vb.net script. It worked for InDesign 2.0 but it does not work with InDesign CS3. Here is my code:

Dim myDoc As InDesign.Document = Nothing
Dim myGroup As InDesign.Group = Nothing
Dim myObjectList(2)

myObjectList.SetValue(myOuterTextFrame, 0)
myObjectList.SetValue(myInnerTextFrame, 1)
myObjectList.SetValue(myContentTextFrame, 2)

myGroup = myDoc.Groups.Add(myObjectList) 

Getting error "Unable to cast object of type 'System.Object[]' to type 'InDesign.Objects'."