so... tried connecting to the ecu with my dyno box tuning lead.. and it only worked ok!! doh! serial/flash lead remains non working, but oddly it let me flash the ecu with new firmware (after several goes) a few days ago. It also talks to S40 ok.. (or did do last one I tried connecting to) Weird.. swapped usb>serial adaptors between leads and its deffo not liking the flash cable no matter what. still i can unlock now.. woohoo.