Managed to get through to matrix support and submitted my problem to them, just waiting for reply. Cant wait to get playing the game!

<t> Hello<br/>
I hope someone out there can help me.<br/>
I downloaded and installed Harpoon ultimate edition but when I went to play it an error box came up saying the serial number I had entered was wrong.<br/>
Repeated the installation making sure the serial number was correct and the same ...