tried it,

also tried completly recreateing the dataset from scratch in code, still nothing...

If you post your code, I'll look at it.  (I don't promise I'll be able to fix it, but without the code, I'm out of guesses.)

  SqlConnection conn = new SqlConnection("Data Source=*****,****;Initial Catalog=*******;Persist Security Info=True;User ID=****;Password=$****");
        SqlDataAdapter Prime = new SqlDataAdapter("some select command",conn);

        
        
        ds = new DataSet();


        Prime.FillLoadOption = LoadOption.PreserveChanges;

        Prime.Fill(ds, "Prime");


        String SelectCommand = "some select command";




        

        SqlDataAdapter child = new SqlDataAdapter(SelectCommand, conn);

        child.FillLoadOption = LoadOption.PreserveChanges;
        
        child.Fill(ds, "Secondary");


        ds.Relations.Add("Secondary", ds.Tables["Prime"].Columns["Network"], ds.Tables["Secondary"].Columns["Network"]);
        

        UltraWebGrid1.DataSource = ds.Tables["Prime"].DefaultView;

        
     }

here is the code...

hopefully this will help figure out the problem...

 i'm calling datagrid.databind() after that function, so basicly there is no difference.

anyways, what i did is to load the entire table into the grid instead of just part of it and do a batch update right from the grid instead of from a custom menu.