为什么我的数据网格视图在我将数据源设置为我的数据集时只显示空白行

I'm brand new to binding datagridviews to datasets. I have a created a dataset and (I think) filled it with a table from a sql server DB. But when I try to fill the datagridview, it only shows a blank, 7-column table with column headings like Column1, Column2 etc. I'm sure I'm missing something silly, but don't where to begin to look. Anybody see what's wrong? I'm brand new to binding datagridviews to datas