passing parameter values through the URL does not work with https

Using sQL Server 2008.I enabled ssl for my report server and report manager. I published two reports on this server, TestReport1 doen require a parameter, TestReport2 has the same dataset as TestReport1, but requires a parameter to be passed.I am testing both reports via URL.https://MyServer/Reports/Pages/Report.aspx?ItemPath=%2fTest%2fTestReport1This works, shows me the parameter prompt, I enter the value and hit View Report and I see results.When I test my second report that needs paramater passed in the URL, it works with http, but not with https.http://MyServer/ReportServer/Pages/ReportViewer.aspx?%2fTest%2fTestReport2&PID=227This URL works and shows me the results.https//MyServer/ReportServer/Pages/ReportViewer.aspx?%2fTest%2fTestReport2&PID=227This URL gives me error: HTTP Error 503 the service is unavailableWhat else do i need to do in order to get the report working with ssl, when parameters are passed through URL.Thanks in advance for your help.