It looks as though you have used a repeat region and repeat selection in the same form on this page. Instead of using both of these you should use only the repeat selection server behavior and it should be applied only to the row in the table.
The submit button that you have is within the repeat selection and is not triggering the server behaviors. It needs to be outside of any looping in order to work properly. The repeat selection tool will allow you to repeat the checkbox and label for them from the recordset in a way that is usable within the manage relational table server behavior. If you have any trouble with this or it is not working correctly after you try this please post back and include the current copy of the page after trying it this way.