textures without shadows

hi, I’m new to blender, I’m practing the UV texturing stuff and it all seems work perfectly but I dunno how to render a scene including both textures and shadows. for example I’ve made this little work here, a sort of survival horror scene:

there should be the light source inside the room (placed correctly if I render the scene with no textures, it shows the shadows and stuff…) but shadows don’t appear. thanks in advance and sorry if it’s already discussed
by the way i’m using blender 2.5

any hint anyone? :o

Post you blend file here http://www.pasteall.org/blend/, make sure to pack your textures inside the blend (File / External Data / Pack into .blend file)

thanks, forgot about the blend file.