I'm not sure if I understand correctly what you want to achieve. If I understand correctly you want to initialize RadDiagnostics in a ScheduledTaskAgent. However, RadDiagnostics is an application tool and initializing it in an agent while no application is running is not the usual approach for using this tool. Please elaborate a bit more about what exactly you want to achieve, so we can assist you further.
I'm looking forward to your reply.
the Telerik team