I meant is it not working at all, fast blinking, half the LEDs are out or what?
For £530 (+P&P) it might be worth taking it to a local electrical engineer and seeing if they can check the wires, connections, soldering, circuit board etc and have a go at putting it right for you (I have no idea what said work would cost though).
also worth checking - the 'Fish sometimes sells used ones
Hoovering up the road
Walkinshaw Performance Power Pack, Headers and Supersport Cats. Ebay Antenna.