Attaching a toolbar to a layout cell aliong with a grid

I am building a page with a dhtmlx layout using the 3L formation. I also attached a toolbar to cell “b”. I also want to attach a grid to cell “b”. I have quiet a few columns in the grid which should result in a scroll. However I do not see a scroll. If I remove the toolbar I see the scroll. Am i doing something wrong? please suggest a solution to the same.

Here is a sample. (145 KB)

We found the error to be the following line of code. Can you please elaborate on what should have been used instead of the line below?

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "">

You can try to use instead.