Fault on my Zanussi Aquacycle washing machine?

I have a Zanussi Aquacycle model num ZWD 1262 W that seems to be have lost it cycle while washing on programme number 5, it starts off as normal then half way through the cycle stops and the didgital clock goes back to the time at start of cycle, the programme has not fully rinsed the clothes or spun them and if you press the start button again nothing happens and I have to turm off the machine and either start again or continue on a rinsecycle, can anyone help please.