Electric hand brake A6

[MAC3499]

My A6 Sline elsctric handbrake caliper was seized. Ive had it replaced with pads and discs both sides. Road test was fine no grinding noise or burning smell anymore. Plugged the machine in to clear the fault but it wont clear still states handbrake malfunction and theres another about the control unit. 

The hand brake will not engage using the switch... Anyone any ideas what i am missing? 

[Steve Q]

Has the switch unit itself failed?