There is currently a known issue with authorising the

V-Station 1.5 in MOTU Digital Performer which causes

a message to appear saying that the serial number

is invalid. To get around this problem you can use a

different AU host to authorise V-Station. AU Lab

is one application which can be used for this and it is free

with OSX TIger. If you do not have AU Lab installed

on your system then you can get it from the OSX Tiger

disc. From the disc, run the package:



Xcode Tools/Packages/DeveloperTools.pkg


Once installed you can find AU Lab in:
HD/Developer/Applications/Audio



If you do not have the OSX Tiger disc then you

can download Xcode free from here developer.apple.com
(you will need to register with Apple first).