FMIS 3.5 - No response when sending seriel to server for approval.

I have upgraded from FMS2 > Flash Media Interactive Server 3.5

I added both the seriel number for FMS3 and FMS2 during the installation process.  When I logged onto the admin panel there was no licence listed, and a link saying "to upgrade to unlimited connections now, click here".

So, I checked the fms.ini and no seriel was there.  I put the seriel number in and restarted the server through the FMSadmin tool.  Still, no licence file was showing.

I then added the licence file via the admin panel and got a dialogue saying "Seriel Key "blah" Sent To The Server for approval".  The seriel key now appears with a valid status of false.  And no further progress after that.   The documentation states that when you add the seriel key in this manner it should recognise it immediately.

Can anyone suggest what I might have done wrong?  I have trebble checked the seriel number, and copied and pasted it to make sure it is exactly right.

Help appreciated as we have a lot more than 10 users at a time usually!