(Windows application)

I've inserted a DataGridView in a UserControl

then I've linked a DataSource using the wizard

a Typed DataSet with DataTable etc...

Then I've created the columns ....

in a column I've inserted a combobox

my problem is that in the form I can fill automatically the combo box...
and view the selected value (using the wizard of the object)

but If I insert the object in a usercontrol I obtain an error during the
execution (not durin the backup)... and the combobox is empty

I think that the problem is because I use a usercontrol and not a
form... but How can I resolve this problem?

Thanks