I have a Web Report Studio report. I've configured report linking to report b in WRS.
When I view the report in WRS the link works fine, report B opens. However, when I view the report in a portlet in the portal I cannot use the report linking.
Are you displaying the report in a Report Portlet? If so, the report is static when displayed in that format. See http://support.sas.com/kb/40/479.html