You should view the Altiris Log Viewer for details. What role did you clone to begin with -- was it already a custom role?
Depending on the error, this could be the cause if servers:
http://www.symantec.com/docs/TECH173043
In general, though, it means you haven't granted rights to particular data classes, see older KBs for version 6 for the basic idea (I couldn't find one for version 7):
http://www.symantec.com/docs/HOWTO4899 or http://www.symantec.com/docs/TECH13145
Does this help? If not, can you post the error from the Altiris Log Viewer?