My problem with activation is a lack of IE functionality on my system and the activation software is not built to access the server with other web browsers. So my attempt at automatic activation failed. I tried Ubisoft Support and Ubistore support and it took over a week to finally get a manual unlock code.
However, I did not need it then because I got a code in less than a day by contacting
support@securom.com. I sent them the vendor supplied code and the unlock request code one morning and they supplied the code that very afternoon. Since they only support the activation software it probably is the best way to go. Ubisoft support has lots of other issues to deal with and it can take some time to get someone to actually understand the issues.