Loading Report Image

I need to show a progress bar whenever the crystalReportViewer is trying to render content on the aspx page. I am dealing with reports that are taking a very long time to load. I tried looking into using the UpdatePanel and the UpdateProgress controls but it does not work. On searching, found out that the CrystalReportViewer does not work very well with Ajax controls. Any help would be highly appreciated.

I am using CrystalReports XI R2

Thanks