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I need to replace my 2way light switch?

I have been trying to change an old 2way light switch for a new one and now have no lights at all!
I have a red and a black, plus a red, a yellow and a blue.
The switch has holes marked COM, COM, L1, L2, L1, L2.
I seem to have tried every which way and cannot even remember where they went to put the old one back on.
Can you help?

hg49, February 2009

home Fix label D.I.Y label_important Lightingdone

all my wires are red 4 in total

kendo, November 2010

With the power turned off at the consumer unit take the screws out of the other switch that controls the same lights - there should be a red, yellow and blue wire. Take note of which terminals they go in and replicate that at the switch you're replacing, but without the red and black wires.

The red and black wires you have at the new switch go into COM and L1.

So you should have something like:
COM - Black
L1 - Red
L2 - nothing

then on the other side:
COM - Yellow
L1 - Red
L2 - Blue (these 3 might be in a different order).

Adam, February 2009