AW.Grid.Extended - an entirely different animal?

I wanted to experiment with AW.Grid.Extended, so I dropped it in in place of AW.UI.Grid, and now nothing works. I keep getting errors (in IE6) that the object does not support this property or method. It complains about just about everything, from setCellFormat to setRowCount to setHeaderText.

"Extended" would seem to imply that MORE functionality is being added to the grid, not taken away. Is something wrong, or is it a completely separate grid control?

OK, I figured out what I was doing wrong. I stared at this problem much too long - so long, in fact, I couldn't see the problem staring back at me. I forgot the "new" keyword in front of AW.Grid.Extended! Makes a big difference. ;-)