How can i make light go through glass? blender 2.5

I have a cylinder that’s transparent with a green cube in it but I can’t find out how to make light go through the glass and shine on the cube. if anyone can help me that would be awesome, it’s probably something so simple that i didn’t see. for blender 2.5.

here is the .blend


Glass-1.blend (418 KB)

add a spot light


In the shadow panel for your green cube’s material click on “Receive Transparent” to turn on transparent shadows.

RickyBlender: what do you mean add a spot light? i already have one.

JDep: ty that worked.