Hi I am having trouble programming the left hand side of my 2 group head Brugnetti C2 Machine. The right hand side is working fine. I hold down the free flow button until the LED light starts to flash. I then push the single shot cup button until I receive the correct amount of coffee. Then I push the same button again and wait for the free flow button to stop flashing. Now the single shot cup button wont activate/work unless I start the program sequence again. Does anyone have any suggestions or have a manual ? Cheers