$.ajax call is blocked by Terminal Service?

Hi,

Just wonder if anyone has similar experience.  In my javascript in CRM 2011, I make a JQuery $.ajax call to retrieve data by passing a OData url.  The $.ajax call works fine when user access CRM in the network, however, does not work when user access CRM using terminal service.  It sounds to me something is disabled in TS session, which makes $.ajax call blocked.  When I debugged javascript, I know the code does not make $.ajax call at all.  Does anyone have advice?  Other javascript code is fine, just $.ajax.  Thanks.