Dlink to BT powerline connections

I have a BT Mini Wifi-Hotspot powerline adaptors; one near my HH4 and the other in my Tv room. They work well i.e. no bufferring problems with BBC iPlayer and I can wifi both my Galaxy phone and tablet at the same time.

I used to use Dlink powerline devices DHP-306AV wired only. I still have these and wonder if I could use them to provide wired broadband to another room. If so how do I get them to connect to the BT devices?

If the plugs are built around the same standard then should work, but their default encryption keys will be wrong. There should be a button to put them into a learn mode so will link to each other, or you'll have to use the supplied software to configure the key for each one.