06-15-2009 02:54 PM
The MDS-CS Simulator can also be configured to provide email simulation, which is why it is interferring with the ESS when both are running. If you want to have the MDS-CS Simulator running it should be the one handling email simulation. The link below explains how to configure this.
How To - Configure email simulation support in the BlackBerry MDS Simulator
Article Number: DB-00651