How can I use clickcolumnheader for my TDBGrid?

I can see the oprion of clickcolumnheader with my object

Dim dlgABILLity
Set aBILLity = Aliases.aBILLity
Set frmChargegroups = aBILLity.MasterForm.MdiClient.frmChargegroups
Set TDBGrid = frmChargegroups.TDBGrid
'TDBGrid.ClickColumnHeader("Destination")
call TDBgrid.ClickColumnHeader("Destination")

but if I run the same it show the error "An error occured"

Dim dlgABILLity
Set aBILLity = Aliases.aBILLity
Set frmChargegroups = aBILLity.MasterForm.MdiClient.frmChargegroups
Set TDBGrid = frmChargegroups.TDBGrid
'TDBGrid.ClickColumnHeader("Destination")
call TDBgrid.ClickColumnHeader("Destination")

I am using Testcomplete 11.

Thanks

Darshana