Jasper server 4.5 -> 6.2.1

[jd6strings]

I recently upgraded a jasper server to 6.2.1 from 4.5 and previously we were able to call a report from a URL for example:

http://192.168.0.1:8080/jasperserver/flow.html?_flowId=viewReportFlow&reportUnit=/report_1&ID=900&output=pdf&j_username=jasperadmin&j_password=jasperadmin

AND the report would diplsay as PDF in the browser window.  In version 6.2.1, the same URL diplays the jasper server web interface and is re-requesting the input paramter (i.e. ID).  When the ID is re-entered and submitted then the report does generate but is displayed in a new window as HTML.  Can someone please explain what possibly changed?

Thank you in advance!