Send a message: https://stackoverflow.com/questions/1540800/sql-2008-reporting-services-i-have-no-rights .
Basically, you will encounter this problem with UAC, if your only rights are exercised through the built-in \ adimistrators group, so that the windows "see" you need to run it with a boost, if you added your Windows account explicitly as the core content everything would be fine, as you discovered.
This behavior will be the same for a SQL server accessing through SSMS, where the only access was granted by the built-in \ Admiistrators, and not your user account explicitly.
Jasonhorner
source share