Can not hide the first column in a datagridview

Hi,

I have 3 related tables in my Sql server Express 2005 database. When I show them in different datagridviews on my form and "at design time" hide the id column of each datagridview by setting the Visible property of these columns to false, I see them when I run my form. I do not why but DataGridView shows these hidden rows at run-time although it hides them at design time. I do not want to remove these rows in order to prevent them from being shown but instead need a good bug fix or any idea to overcome this issue. Thanks for all helps.