I have the Razor Basilisk V1 which the left clicker has finally given up.

I have bought the Razor Basilisk V2 & V3 (I hate the V3).  However the middle mouse button doesn’t seem to work on both mice. I have re-install my mouse divers, re-installed synapse and re jigged profiles and reset the buttons.  As of yet nothing works. 

How the hell do I fix this?