Error code S102 means that you need to call 0800 953 9500 to activate the box.
You will need the box serial number, and your account number and area code.
As to pairing the existing remote, you might be better trying with new batteries.
I hope this helps
Press the Channel minus button on the front of your V6 box for 10 seconds The Power light will go Off and On. After the light comes back on the V6, it will be ready to pair with the remote control Pairing Mode remains active on the V6 for 5 minutes allowing you to try the remote instructions again if unsuccessful on the first attempt.
Getting the Remote into Pairing Mode Hold the Info button down on the remote for 7 seconds until the light on the top of the remote goes green Press any key on the remote and if pairing is successful you will see the light flash GREEN Twice To confirm if pairing was successful Press and hold the channel plus button on the front of your V6 until you hear a bleeping sound coming from the remote control
The Service you do for others is the rent you pay for your room here on Earth - Muhammad Ali