In reply to HB9BRJ:
Hi Markus, this problem is a server application/server environment issue. As of yet there is no real fix. It is intermittent and very difficult to pin down the cause. It’s probably something to do with load balancing at the database host. I’ve not had time to discuss this with the hosting company but reviewing fixes on MSDN and Google searches shows that many other people have this problem intermittently.
Now the good news. The database is designed to preserve the activation you are enetering whilst it is incomplete. Should a problem occur such as this or your computer crashing, then everything entered so far is saved. When you try to enter this activation again, the database will prompt you to either continue the partially entered activation or to discard it and start again.
So next time it happens you can simply close the tab with the database window. Then open a new tab and go to the database site and log in again. Then try to enter the activation you were entering and you will get the prompt to continue. Or you can enter the whole activation in a CSV using Excel, OpenOffice or a text editor (not Word) and then upload that in one hit.
Until we find out exactly the cause then this is the best I can offer.