I posted this same problem recently.  It was resolved by downloading and installing 1.05.  Things have been working perfectly.  I have upgraded to OS 10.6.3.  I don't believe i have made any other changes since the last time I used the tranzport.  Now, I am back where I was at the beginning of the last post.  When I plug in to the usb port, I get the remote to link up.  The tranzport manager appears in the toolbar and I have set it to native.  DP allows me to send and receive midi to the tranzport.  However, even though the driver (tranzportub.bundle) is in the motu control surface folder, it doesn't appear as an option in the control surface window of dp and I don't get any control of dp or information in the tranzport window.  Helpp!

Thanks

Doh, it's me, Albedo.  Failed to download DP version 1.05.  Did it and all is well.  Whew.

I just upgraded my rig, using a dual quad core mac, osx 10.5.8. 
I loaded the latest drivers and copied the TranzPort bundle into the proper location of the system folder.  The USB interface and remote control units are seeing each other and I have set the tranzport manager in the task bar to native.  I have opened DP 7.1 and the control surface does not show Tranzport as an option (although the HUI and Mackie Control are there).  I do see the driver in my extensions folder.  DP does give me the option to choose Frontier in the midi option.  What have I over-looked?

Thanks