[dba-VB] Column's not declared by column name

I used VB Express 8.0 to retrieve a dataset from Northwind's Customers 
table. I dragged that onto a form to create a quick datagridview control.

I wanted to disable the automatic column sorting for a specific column, so I 
added the following to the form's Load event:

Me.DataGridViewTextBoxContactTitle.SortMode = 
DataGridViewColumnSortMode.NotSortable
where ContactTitle is the column's name. It returned a Build error that the 
column wasn't a member of the form. Using Intellisense, I could see that it 
doesn't list the columns by name, but by number. I substitued ContactTitle 
with Column4, and it works just fine.

I don't get it -- is there a setting that I need to flag differently or 
something? This goes against every guideline I know!

Susan H.