If you have a new remote control, you have to programme that remote with the special code for your tv before it will work in changing channels and volumes etc
YOu start the proggramming sequence by TV slect and red, input code, slect and TV.
If done correctly you remote will function correctly...
"press tv on the remote &hold down select & the green key then enter the channel number the TV uses for Sky". My TV uses EXt 2 for Sky, entering 2 does not work."
you should not have to do this to change channels if your remote is programmed correctly
you can try here:
http://www.satandpcguy.com/Site/programe_sky_remote_to_control_tv.php
or even Interactive, Customer Service, Programe your Remote on your sky remote control - this may be better as it has a full up to date list ofd all the TV codes...not just generic codes but many codes for different models by the same compnay.
hope this helps