thanks for your reply.
1 - EOS Utility was not running and did not start to do so after powering on the camera after being connected via USB cable
2 - camera was running on battery
3 - camera was working properly stand alone
4- maybe -
5 - was plugged on both ends properly
6 - usb port is working on my laptop as I use this for mobile astrophotography
7 - I am running BYEOS v3.1 under Windows 7 Professional V 6.1, SP1 -> there was nothing to chose from -- it was simply not possilbe to connect to the camera
8 - ?
Thanks & Regards,