Hi,
how did you connect your Sky HD Box? The BV7 has to know, if the box ist on. Otherwise the BV7 might not send all IR commands to the box.
Did you connect HDMI and SCART? If not, use an additional SCART cable, it may help (the BV7 to see, if the Sky Box is on). If Your BV7 has a new software (5.0 od 5.02) you can teach the BV7 to recognize over HDMI, if the box is switched on.
Greetings
msinn