I'm having trouble connecting my computer to my ecu. When I select edit ecu it will negotiate coms for about 3 seconds then display "XX file not found XX." I tried different computers but all say the same, changed the serial cable with a spare, tried a different calmap 6.32 source, and yes the ignition was on. Can anybody help me. If it helps, when i turn on the ecu while it trys to communicate it gives me a "Device I/O error."