I only bought it last year and it had some flowers on it then, but I can't remember what time of year it was - possibly the spring. I was hoping it would flower for Christmas but nothing happened 
It sits on a shelf that is very shaded, in a room with central heating. My mom's Christmas cactus is flowering like crazy right now and it lives on a cold, south facing window sill. Do I need to move it to somewhere brighter/colder or could it be something else?