I have purchased a used Grundig Sky Digibox model GDS310 (38STM). It has an old blue Sky card in,but it may not be the original. I want to use the box for FTA reception only. It will not read a Yellow house card as the operating system needs updating (it is version 1.2S4Bc and the epg software is version 2.8b*) I need vF3 and 3.2.11. Is it possible to update this software as I am not registered with Sky and am not the original owner of this box. I know you plug into the phone line, hold down the update button when switching on and the phone lights come on and it says on the screen updating software etc. but nothing happens! Can anyone help me?