giving a movie texture to lamp (spot) in cycles im currently making an underwater scene which has caustic lighting in it, so i prepare the objects (lamp, 2 planes, one with ocean modifier) and give movie texture to the lamp and... it doesnt work.

i know how to do this in blender render, in fact it just works like the same as i did in cycles render : give a movie texture to the spot lamp and it works. but it looks like cycles doesnt work the same as blender render.

here's what it looks like when i give texture to spot lamp in cycles

i've connected a texture coordinate : reflection node to the movie texture
(edited : it works and it animated, i tried rendering it out to see the light and it animated)
might not be exactly what you need but could help.
The set up is for a videomapping.
Create a spot lamp, you might need to crank it up very high (Like VERY high, use filminc blender if needed)Put a plane between the spot lamp and the surface that needs to capture the projection. Nodes for the plane



animate the offset if it is a video file