C'mon people, I can't believe for a minute that there is noone out there who knows what other ports (if any) have to be opened on my firewall for MDS work properly. My device activates ok but application responses get blocked by my firewall. I know it get blocked at the firewall because dropping the filters allows it to work. I also know it is the response because the log files show that data was received. My BES server is also behind a proxy server and am not sure if that is causing a problem.