set_report_object_property

Where do you add an expiration parameter and authid parameter to a report_other parameter that also has a paramform=yes?  I have tried a few different combinations and can't get the expiration=1 to work.  Example of my report_other setting:      set_report_object_property (repid,report_other,'paramform=yes P_USER_CONNECT='|| vc_connect|| 'P_SERVERNAME="||v_reportserv|| ' P_ACTION='|| v_report_url|| '/reports/rwservlet');