Question about Acrobat 7

I bought a copy of Acrobat 7 and used it for some time, then I didn't use it for a while, I got a new computer and wanted to install it and use it again.

It installed fine, but would not activate as the activation server was not found.

Will someone please tell me how to activate it so I can use it?

Thank you

[Private info removed and title edited for clarity]