DataGrid / Template Column

[g2]

I have a DataGrid with a template column (displaying a
checkbox). The rows of the datagrid are being populated
from a db table. Currently, only one record is being
retrieved from the table. This record is being displayed
in the datagrid along with the checkbox. Now, rows 2-5 are
blank with only the checkbox. How do I prevent the display
of blank rows? Currently, these rows are being displayed
because of the template column (check box).
Thanks.