Sky mini box buffering

[DF26]

Hi, I've got an issue with buffering on Sky mini box, I've built a room in my garden very close to the house, I've put a BT disc in as a wi-fi extender and that is working brilliant, I have full WiFi on my phone and laptop and getting the same speed as I would in the house. So I presumed that as WiFi was good I'd just plug in sky mini dish and off we go, but it's buffering and stopping/ starting, am I missing something here as I presumed that the sky mini would pick up the signal from the BT disc extender which has an excellent signal,? Can anyone help??? 
 Thanks Dave 

[Chodley]

It doesn't. Unless you have Sky boradband. It has to connect directly to the Q. You can give it a non-wifi route to do that by possibly hardwiring it into the BT disc, sometimes works (I do that with ny Q box to stabilise its connection to the internet)

or powerlines.

or a Q wifi booster which can act as a bridge specific to the mini-Q connection. Those don't seem so easy to get hold of these days.