Mains Ethernet Adaptors On Different Ring Main Circuit Can Anyone Help ?

[tellboy]

I have a pair of Comtrend Mains Ethernet adaptors.
My Router is upstairs. My YouView Box is downstairs with the TV.
I have been through all the access point/end point set up which works as long as I pair them both up either upstairs or downstairs.
When I have the access point one upstairs on the router and the end point one on the YouView box they just wont connect.
They are not on extension leads but they are on separate fused ring mains circuits.
Nothing in the manual mentions this but could this the reason they will never work in this situation ?
Will I have to buy a wireless adaptor ?

[Old_Geezer]

Given data comms is over ethernet not the mains wiring, I can't see how each gets it's power should matter much. I guess there may be an earth level issue, but I think that's clutching at straws. I think there must be a different issue that causes the lack of comms when in different rooms.

[tellboy]

Thank you but I am sorry I don't understand ?
The Ethernet cables go from the Router to the Adaptor and on the other from the Youview Box to the other adaptor.
I thought the data stream was then using the mains wiring in the house ? They are not wireless adaptors,

[tellboy]

I have just found clip below this on Google my house is also Victorian so could be the same. The manufacturers bit at the end sounds to be valid in my case.
Start
My problem is that my house is 150 yrs old and, although it was rewired recently by a previous owner, the normal power rings are not laid out like a new-build house. This is partly due to the fact that the previous owner was a skinflint and partly due to the layout of the house. This means that the router, Desktop and the collective AV Equipment, although all downstairs, are on three seperate power rings.

The guy in PC World told me that although manufacturers say that their powerline adapters won't work from ring to ring, across the RCDs, they actually will work.
Stop

[tellboy]

Thank you, that is a possibility. The upstairs and downstairs sockets are individually on two different circuit breakers. I had thought of not bothering and just running a RJ45 cable from downstairs on the TV to the router upstairs . Having bought the Adaptors I would liked to have used them.