Grid problem when populating - this.obj.firstChild is null o

I am getting an error message when one of my grids populates and I am not sure what the issue is. The error messaage is “this.obj.firstChild” is null or not an object.



grid xml:



<?xml version="1.0" ?>





    

Row #

Search ID

Scheduled Search ID

Search Name

User ID

Iteration

Hits

Run Time



    

        

            modern

        

        

            false

        

        

            js/grid/imgs/

        

    







Data xml:



<?xml version="1.0" encoding="UTF-8"?>





1

81

121

Presidential Search

12

1

100

02/04/2009 11:48





2

81

121

Presidential Search

12

2

100

02/04/2009 12:48





3

81

121

Presidential Search

12

3

100

02/04/2009 13:48





4

81

121

Presidential Search

12

4

100

02/04/2009 14:51





Be sure that configuration XML is really loaded before data one, because the error, which you have described, appears when data loaded in grid which wasn’t configured.
( the xml is correct and loads correctly in local samples )