Failed to define the first row as a header row in a data table

[Amirr]

Failed to define the first row as a header row in a data table

 

[Amirr]

Failed to define the first row as a header row in a data table

I use apple script "set row type of row 1 to header row" and get error saying "Adobe InDesign CS6 got an error: Cannot set row type"