For snapshot based reports, the snapshot definition will dictate what data is presented within the report (it's possible that there's no data in the db for it to report on). It's important to understand exactly what report you're running, what snapshot definition you've associated with the report and validate that the data actually exists within the IdM deployment before you captured the snapshot. If all else fails, I suggest you apply the latest maintenance to your IdM deployed application and re-import the biar file to the report server, then retest.
The CMC URL has changed based on what version of Reporting you're using and whether or not you're using Tomcat or IIS. Assuming you're using the latest supported version (CABI 3.2) running on Tomcat the URL would be:
http://HOSTNAME:8080/CmcApp/logon.faces
Please respond with any questions or concerns.
Thank you.
Regards,
Chris.Thomas@ca.com