TableAdapter FillBy Query With Parameters Doesn't Work With LIKE Operator

Banging my head against a wall here. I have a query that looks like this.

SELECT FirstName, LastName, Address
FROM Members
WHERE FirstName LIKE 'JOE%'

That works absolutely fine in query wizard and the DataTablePreview data window. However, when I do this.

SELECT FirstName, LastName, Address
FROM Members
WHERE FirstName LIKE ?

I get nothing when I run the fillby method. If I change the LIKE to =.

SELECT FirstName, LastName, Address
FROM Members
WHERE FirstName = ?

Everything works great. I need to get LIKE working though so I can wildcard search.

I'm using the SQL server OLE db connections if that means anything.

UPDATE

Using the LIKE operator doesn't work at all. When I just swap out = for LIKE. Nothing is returned.