Just moved house not that long ago and decided to wall mount my screen. As a result of this i needed a longer scart lead (5m). Now when i plug in the scart from sky to tv there seems to only be an intermittent signal coming through. I then bought a second cable thinking that this was the problem but exactly the same problem occurs. When i use the original 1m cable all is well. Both 5m cables are fully wired.

Oh forgot to add that there is a stable picture when i change to pal but is very fuzzy.

Anybody had the same problem?
Is it a problem with length?