Miki,

what do you have planned to do after connecting your PRO to the computer? There are several options to di a connection:

a) Connect via MIDI (for playing MIDI files from your PC on the PRO for example)
b) Connect via audio line (for recording audio in your PC and converting that to MP3 for example)
c) Connect via USB (you need and optional interface from musitronics/Germany) for making backups from your PRO HD

The only thing which brings you nothing is to connect via SCSI :-(, because both devices (PC and PRO) are SCSI master. The SCSI port on the PRO can only be used for connecting SCSI slaves (like SCSI CR ROM drives or hard disks)

Regards

Ulrich