Hi, Can someone help a newbie. I have bought a house which has 6 x L5508 dimmer rails and all work OK except one channel on one rail. The rail has 3 spare Channels, but one channel #7 is permanently ON (It controls a single light). The remote switch has no effect and when I try to reprogramme using the Learn Mode on the rail, it has no effect. The power stays ON the light throughout the Learn sequence. Can anyone advise what is wrong and why the power is permanently On for this channel? How do I remove the power from this channel. Can I use a spare channel or will it require a rail replacement? Thanks.