GridView not updating when I hide a column

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Hello all,

I have an ASP.NET page with a GridView bounded to a DataSource. When I
click the edit button/link, I'm able to update the data with no
problemos. However, if further in my code I hide a column, i.e.:

_gridView.Colum ns[4].Visible = false;

then when I try to save the changes made to and edited record, it won't
do anything. This only happens if a column is false.

Any ideas about why this happens? Thanks in advance.

Regards,
Fernando Gómez.