[2005] Data Grid View problem

[Desolator144]

I can't get my datagridview control on my form (named dgv) to actually display a dataset that I know is not empty. I know I'm forgetting something stupid but I skimmed through the list of methods and properties of the datagridview control and I didn't see anything too familiar. Here's my current code:

        Dim ds As New DataSet()
        ds.ReadXml(txtPathA.Text)
        MessageBox.Show(ds.Tables(0).Rows(0).Item(0))
        dgv.DataSource = ds

And the messagebox does in fact show what's in the first table's first row in the first column but dgv is still totally blank and has a rowcount of 0 and everything after it all executed. I know with like list boxes and stuff if you bind it to a datasource, you have to set the display member or something but I don't remember what I'm forgetting for the dgv!

EDIT: well I just realized it can display one single table at a time but I couldda sworn I saw a DGV at some point display multiple tables at a time so what's up with that?