I am using version 9.2.20092.2099 of the controls in an ASP.NET 4.0 application.

I have an UltraWebGrid inside of an UltraWebTab.  The grid is bound to a dataset that whose columns are bit fields.  The UltraWebGrid columns are set to be check box columns.  This aspect of the application works fine.

I run some javascript that checks or unchecks all of the checkboxes in a column based on a user action.  This also works correctly on all computers except one.  For one of my clients the javascript fails and I have determined that the reason is that the client sode IDs of the check boxes in the grid are different for teh application running on one particular web server.  Here is an example, for one specific check box that has different names in the client side:

tabRolePrivs__ctl2_grdSampleTypes_ctl04_chkSampleAddSample              <!-- Most common

tabRolePrivs__ctl2_grdSampleTypes_chkSampleAddSample_0                     <!-- The exception

The Infrgistics files and my application files are the same for the two scenarios - I even copied the customer's database to my server so I woudl be hitting exactly the same data.  I get the IDs labled "Most common" above, while running the application from their server gives different client side IDs.

I am looking for some guidance as to what might be causing the difference?  Is it an IIS version or an OS version?  Maybe an OS Service pack?  This customer is running Windows Server 2003 with IIS 6, but I have other customers running the same OS and IIS version that do not have the problem.

Any guidance you can give me would be appreciated.