Product Keys

I'm attempting to activate my Articulate software with one of the many keys we have, but we keep getting a message stating:

"We are unable to contact our activation server. Please try manual activation".

This has been happening for over a week now on several workstations. Can you someone confirm if there is indeed an issue with the server, or is there something else we need to be doing? I figured we were already entering the key manually, and it then prompts us to send an e-mail to the server to fix it. However, the system is a training LAN and doesn't have E-mail setup on it.

On the same point, if i logon to the workstation with my admin account the software works (making me think that there is already a licence key on it) but it doesn't work when i logon using a user account. So, are the keys user or machine specific?

Any assistance appreciated.

Stan