Thanks for that. Just checked my cable, and thats using 1.4.1 firmware too, so it must be a fairly common version. I've only used my techstream on a 120 however.
I assume the download was a virtual box VM, and you didnt create a VM, take windows XP and install techstream in it yourself - which sort of suggests that the installation has already worked elsewhere. Plus the fact that you've had your setup working on your mates vehicle suggests to me that your installation is probably OK....
So... turning to your motor - have you double checked your OBD fuse? (Quick google suggests it might be fuse number 15 in the internal fuse box, but double check that!)
Good luck!