"Despite following the manufacture's instructions":
You are onto a looser with this one.
1: "Sky Box EPG information (EPG Guide)" can only be Downloaded to A Sky Box.
2: "Freeview EPG information (EPG Guide)" can only be Downloaded to the DVD/HDD recorder, If it has a Freeview tuner built in.
Sky EPG & Freeview EPG cannot be Downloaded into a Single Box.