I successfully paid for the upgrade version with a credit card and received your confirmation mail with the product key. However, I got the above error message during the installation.

I read through the last post here from the person with the same problem and now have the "Offline Manual Activation" page open. However, I need the Unlock Code.... ?

I downloaded the previous version with no problem so I don't know why I get the above error (not being able to conect to your server).

Hoping for some help asap as I planned on updating my company's homepages this weekend. 

Thanks