SharePoint 2010 - Telerik CAPTCHA - Hangs up randomly during Next Image.

[Ricky]

Hello,

We have a SharePoint 2010 environment.  We put the  Telerik CAPTCHA to a web part but are experiencing issues with WFE server(s) hanging at random times when the “Next Image” was used.  It would always come up the first time and could be successfully used but then randomly it would not work when ‘new image’ was requested from the link and it will just hang.

We would get the following error:  Uncaught Sys.WebForms.PageRequestManagerTimeoutException: The server request timed out.

It works when there is only one WFE is involved.  We have multiple WFEs and it would fail randomly.  

Any idea/thoughts about the issue?

Thanks,

Ricky