This is an important part of your learning experience and is also important for getting something done successfully.
Reporting Services service events are logged in SharePoint's Unified Logging Service
(ULS) trace log beginning with SQL Server Reporting Services 2008 R2. The trace log location is
%CommonProgramFiles%\Microsoft Shared\Web Server Extensions\14\LOGS\. Reporting Services-related specific categories are available from the SharePoint Central Administration by first bringing up the Monitoring page as shown:
And when you click on Configure diagnostic logging, the following page is displayed:
You can enable the ones you want ...