I did a quick search of our logs and it appears that you purchased RecordPad. Registration information is not interchangeable between products, if you purchase RecordPad you will only be able to register RecordPad. If you wish to register WavePad you will need to purchase a WavePad software license. Please check your invoice for details of your purchase.
If you had visited our Registration Support page then you should have seen the "Contacting us for Support" section, which is how you should contact us regarding your Registration issues. Please do so! We do have a technical support number, but simply due to demand we are only able to provide this to Platinum Support customers.