Middle mouse button not working roccat kone

Hi all,i have a roccat kone mouse,in the last week the middle mouse button has stopped working,the scroll up and down movement works but not the middle mouse click function,i have had the mouse around 6 months and have had no problems until now,any advice would be great,thanks all

do you keep hearing the CLICK whe you press it? if don't probabily the mouse switch is broken (is very common depending on how frequent, or ammout of strengh that you apply in that key;

Looks like this:
http://upload.ecvv.com/upload/Info [...] Switch.jpg

you must or buy another of those, or take it from any old mouse you got there;