i bought Halo Reach on the Xbox One since it is combatible with the Xbox One and I have Xbox live gold as well but for some reason the matchmaking says I am not connected to Xbox live gold.
Press the back and start button at the same time. Sign in to your profile through the old xbox 360 way. Then exit the screens back to the Halo reach menu. This should sor the problem out. This is a problem with the emulator. Not your xbox gold.