BoundColumn width wont stay?

Question

I have a datagrid with BoundColumns. I have set the width on the datagrid and the boundcolumn headerwidth, footerwidth, etc.. But it continues to grow and what ever the greated data length is. I have a form under the grid to insert a new line of data and I want to columns to match up with those. How can I make the columns hold their width. This is for web so DataGridTableStyle cant be used. Thanks in advance. Chris Auer