Please try downloading and installing Product Manager and try registering your product through that.
I also don't recommend posting your unregistered serial number on a public forum, you are just asking for it to be registered by someone else.
If you still can't register your product via Product Manager, please see this FAQ below and contact Toontrack Support directly via the Contact Support button in the FAQ.
http://www.toontrack.com/faq/i.....ould-i-do/