dhtmlxGrid with dhxCalendarA

In my ROR app, I am using dhtmlxGrid (dhtmlxGrid v.2.0 Professional edition build 81009) and I have a cell type dhxCalendarA.

Grid works fine in Firefox but it chokes in IE 6. If I take out date column, it works again. I saw the following in console:

Error sending file …/public/javascripts/dhtmlx/dhtmlxCalendar/codebase/imgs/cal_arrow_bwd.gif: Broken pipe

Nov 22 20:51:00 –

The error seems not related to client side code , but somehow occurs during server side operations.
Please be sure that correct path to image folder set and related image - cal_arrow_bwd.gif is really exists in specified location.

Adding the following fixed the problem: