Thanks for the answer, it was the cable. I went and bought siemens own cable and it worked. the pinout diag on page 83/4 of OP3 manual is a bit vague.
Thanks again.
I have protool v6 sp2 and cannot connect to the OP when down loading the project, i have tried D9/rj12/MPI but to no avail pleae help(step by step) please as i have used this stuff for ages. normally work on PC416 and above.