found the problem, surely nothing to do with telerik.
==============================================
Hi, I got following error we.ui.webresources.axd, and my site doesn't use HTTPS or making any HTTPS requests..... it work perfectly in local environment, but not remote, any idea?
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 1.1.4322; InfoPath.2; .NET CLR 3.5.30428; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C; .NET4.0E)
Timestamp: Tue, 21 Sep 2010 21:46:15 UTC
Message: Sys.WebForms.PageRequestManagerServerErrorException: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.