Multiple SSRS Reporting Services on the same computer

Hi All,

I am installing multiple AX 2012 AOS instances in a single server which will be used to connect to multiple SSRS Reporting Services instances. Just like the one from TechNet :

However after modifying reporting services configuration files (I’ve narrowed down the problem to RsReportServer.config file) I cannot start the Reporting Service instance and instead it gives me an error in the Event Viewer:

Service cannot be started. System.Exception : Default appdomain failed to initialize.

at Microsoft.ReportingServices.Library.ServiceAppDomainController.Start()

at Microsoft.ReportingServices.Library.ReportService.OnStart(String[] args)

at System.ServiceProcess.ServiceBase.ServiceQueuedMainCallback(Object state)

Where did I go wrong?

Thanks in advance.