Soundtrack Error message: registration error

I have an Apple Soundtrack Pro that is giving me a headache for the past few days.
I keep getting a Registration Error when running it.
This software is a registered version, and I got it from Final Cut studio.
How can this happen?
And also, I have been using it for quite some time now without errors.
Please send some help.
Thank you.

Registration Error
An error occurred: coreFoundationUnknownErr.
