Error > SSRS 2008 R2 > System.AppDomainUnloadedException: Attempted to access an unloaded appdomain.

Hi

One of the report often fails with an error at client end while loading

'The remote server returned an error: (401) Unauthorised'.

This report is accessed through CRM 4.0 and sometimes works fine.

In Report Server error log (Please follow following link to go through complete log), this turns into 'System.AppDomainUnloadedException: Attempted to access an unloaded appdomain.'

http://sdrv.ms/SuMkvO

Can anyone suggest how to fix the same.

NOTE: Environment Details: SQL SERVER 2008 R2, Windows Server 2008 R2, CRM 4.0, Report Server configured with Hardware load balancer.

Thanks in Advance...