Check what firmware you are running. Turn the bot off and then on again- The Firmware version should flash on the LCD screen. For a Replicator 2X you should be running Firmware version 7.2. If this isn't the case, please update the firmware through Makeware. It is best to download the latest version of MakerWare form here as updates are being constantly implemented. This new update may fix your "service error" issues although this could be caused by something on your computer which is interfering with the background service that MakerBot needs to slice the models. Try going to the 'Services' menu and stopping then restarting the background service.