Symantec PGP error

I am trying to add new user to PGP Desktop. I keep getting the error "unable to enroll (failed to import License Number, error -11933). I've confirmed we have enough licences so we should be able to add another user.

here are some the links i found which relates to the issue we are having

http://www.symantec.com/business/support/index?page=content&id=TECH149302

http://www.chetan-desai.com/myblog/?p=824

I was wondering if anyone came across this issue and how did you resolve is.

thanks