Okay, I tried to boot again with that jumper placed one pin further but no result. When that switch on the rear is activated and card is deactivated I though I could attach my scsi devices but no way !! I booted with my Workbench 3.1 disc (finally found it in my room !!) and then inserted the AsimCDFS disc to use ScsiInquire to see what devices are connected, but then there's not even an Evolution.device according to that program. It seems that this switch on the rear really deactivates the card, probably to get more compatibility with games that don't like add-on's ... damn, advice is really needed ...