_parent is null

Hi All,

when I load the grid on a page I am getting the error above... any ideas?

here is the code. It works fine on an isolated page, but integrated into a page that use scriptaculous library, prototype library, etc. gettimg the Runtime error above

var grid = new AW.UI.Grid;
// attach the grid to the span above
grid.setId("thetable");

grid.setCellData(data)

grid.setColumnCount(columnHeader.length);
grid.setHeaderText(columnHeader);

NRDRanker.grids.push(grid);

grid.setRowCount(data.length);
grid.refresh();

Can you include the libraries one by one and find out which one is causing the problems?