Ok if your receiver is over 12 months old then it may have been disconnected, when it says connecting just press exit three times and select say JSC sports 1~10 (on Hotbird) if this starts working then your Ethernet is working (you can go into the menu-network-Ethernet and now it will say connected. If the JSC channels are not working then your receiver will be over the 12 month connection period.
No they are not working, so I guess there is no way to get these channels back?