I have been running windows 2003 & ActiveSync 3.8.0 on Mitac Mio 168 (PPC). I have been able to sync without any problems via a usb, until I installed the Samsung Black Jack Smartphone. Now I only can sync with the Smartphone. When I plug in my pocket PC, I get the following message on my ppc: "Communication Error:Cannot start communications with the desktop computer. Remote Networking could not start due to a critical error (Error 608). Please reconnect your device. If the problem persists, restart your device using the instructions provided by the manufacturer." I have checked & re-checked: -the ActiveSync connection settings (Tools -> Options -> Options-> Select USB in "Enable PC sync using this connection) ; - The windows firewall - Reset the ppc; - Remove and reinstall the Activesync software in my PC - I have installed the Activesync 4.5 upgrade version Anyone have any clues on how to fix this?? Any help would be very much appreciated.