Unable to register Sonar LE (SOLVED)

I purchased a Boss ME-25 today and it came with a copy of Sonar LE. After installing the software and running the program a window pops up saying I have 30 days to register and provides a Register Now button. After clicking the button I am taken to a page where I have to provide details to receive a registration number.
 
The problem begins when I select Sonar LE from the product list. As soon as I do, the field for Serial Number changes to a box with text "will be sent to you" and I am not able to enter the serial number of my software. (I have included a screenshot of the form).
 
When I complete the form as is I receive the following email:
 
"Please do not reply to this email. Messages received through this address are not processed. If you need additional assistance with product registration please contact our customer service team at 1-888-CAKEWALK or

Thank you for registering this copy of SONAR LE. Your registration information is below.

Serial Number:
CWSL400851019722038

To complete your product registration copy and paste the registration code above into the registration screen of your Cakewalk software in the appropriate area and click the 'complete' button. Save this registration code for your records. We recommend you write down the registration code and the email address used to register your product (this email address).

Thank you for choosing Cakewalk!"
 
The number above is not a registration number nor is it the Serial Number of the software I have installed and when I paste it into the software it throws up an error message:
 
"Invalid registration code. Please make sure to enter the product registration code exactly as you received it from Cakewalk."
 
How can I register this software? I'm in the UK, if that makes any difference.
 
Thanks.
 
EDITED to add that I have managed to successfully register the software. The problem was that I was selecting SONAR LE (which is the name at the top of the program!) and not SONAR 8.5 LE on the registration site.