Hi,
Thanks for your help but this wasn't the problem I have fixed it and in case anyone else has this proble, this is how. I uninstalled uplay under control panel (where it is called ubisoft games launcher.) I logged into uplay via the browser and downloaded uplay and installed it. I typed in my email and password and now everything is fine. I think uplay was corrupted. I picked up the campaign where I left off and everything is hunky dory.
PS This was on a Windoze 8 machine
Cheers all and happy times,
Krunch