Hello, It has been a few years since my equipment has been setup. Within that time I upgraded my software for OS 9 to OS X 10.4.11. I have since reconnected my equipment using DP 4.5 and my Fastlane USB. I needed to download a upgraded driver for the Fastlane since my existing driver was for OS 9. I am using a Korg Triton workstation LE into the Fastlane to to my Mac. The problem occurs when I go to playback my earlier projects - the application shuts down. When I try to record a new project - the application shuts down. My guess is that 4.5 is not compatible with OS X 10.4 -- does anyone have any info that can help me out.