Script error, While working with Menu control in Update panel

Hi,

In my project, one of page contains <asp:menu control under the update panel. While testing in my local system (i.e XP OS installed) it is not showing any Script error while clicking on the menus or moving mouse over menus.

But after publishing and uploading into the server (Wind. Server - 2003 OS installed), it is showing script error. The error is:

Microsoft JScript runtime error: '0.cells' is null or not an object

Please suggest a good solution for the above prob.

Thanks in advance

Raja