how to dynamically delete a column from a gridview

when the user selects an option from a dropdownlist ie ACTIVE . i want that column 11 of gridview should be visible=false
this code is Not working when there are no records in a gridview.

 

if (ddlstatus.SelectedValue == "ACTIVE")       //dropdownlist value change

{

lablestatus.Text = "ACTIVE USERS";

//e.Row.Cells[10].Visible = false;    

if (e.Row.RowType == DataControlRowType.DataRow)

{

LinkButton lnk = (LinkButton)(e.Row.FindControl("lbaccept"));

lnk.Text = "Block";

lnk.CommandName = "Blocked";

}

}