TIWDBAdvWebGrid and async refresh question

I have a form with several search edit fields, a search Button, and a tiwdbadvwebgrid.  When the form is display the grid is empty.  The user inputs search parameters the clicks the search button.  I have code in the async click event that updates the dataset then calls the tiwdbadvwebgrid1.AsyncUpdateAllCells function.  I have verified that the dataset is updated, but the asyncupdateallcells doesn't update grid.  

What is the correct way to asynchronously update/refresh the advdbwebgrid?


Forgot to add this.

I'm using Intraweb 12.2.19 with latest TMS intraweb components.


Please note that extra rows/cells are not added asynchronously.
Can you try to set the ShowRowsAlways property to true?