Redemption codes typically are not serial numbers. You should have instructions somewhere telling you how to redeem that code in order to get the serial number. Lightroom serial numbers have 24 digits (six groups of four numbers), and the first four digits are 1160. The serial numbers are all numerical digits, there are no letters. So I think you need to do a little more digging. If you have more questions, please ask. But do not post any numbers that you have. This is a public forum, and you make your numbers available to anyone who happens to look here.
Thank you for your reply - the error must have been mine somewhere along the line as when I reinserted the information 20 minutes later, no problems were encountered . Thanks again!