vb script insert table row before current row

How do I insert a row before the third row of a multi row Microsoft Word Table using VB Script  (not VBA)        

Here is my code and errl
dim tbl
set tbl = wd.ActiveDocument.Tables(1)                        
set newrow = tbl.rows.add(3)

Error:  http://www.screencast.com/t/mV9EUiu03