Few days back I was asked to look at a MS CRM 2011 system where Out of Box reports were working fine however custom reports were giving error (rsProcessingAborted). If MS CRM 2011 is installed on a separate server and
SQL is on a different server and you are getting the same error then this post can be helpful for you.
You need to follow the steps below/
1) SSRS connector is missing or not installed. The SSRS Connector needs to be installed on the SQL Server system. The installer for SSRS Connector can be found under MS CRM installation media. Installing the SSRS connector requires MSSQL service to restart. This should solve 90% of the problems as this is one of the most common step that may be missed out in a CRM installation. To see if SSRS connector is already installed or not please go to c:\program files\SSRS Connector if this folder is already present then SSRS connector is already installed. I will advice you to repair it even if it is installed.