Using SharePoint page viewer to SSRS report on Windows 7 client vs Windows XP client

Hello!  I've got a SharePoint 2010 web page using the page viewer linked to an SSRS report.  The Active Directory accounts are in place in both SharePoint and SQL Server (2008 R2).  If I open the report from a Windows 7 system, it works fine, but if I open the report from an XP system, it won't display at all.

Any suggestions?