One of the main reasons why the serial number is not valid is because you are trying to authorize a Gospel Musicians brand product using the UVI authorization method. As of 2018 all GM products (Neo-Soul Keys, BASSalicious, FM TiNES 2, MIDIculous 4, etc..) are all authorized using a standard serial number system. Please see detailed videos below:
All Detailed Video Demonstrations:
1. How to access my products and download the installer - VIDEO HERE.
2. How to Download the FREE Player and Download the Program - VIDEO HERE.
3. How to Download Software, Activate Expansion, and Download Samples - VIDEO HERE.
4. How to Extract Files - VIDEO HERE
5. How to Download Samples Only - VIDEO HERE.