Angraecum eburneum/super bum wont bloom

[Pokey49]

I have had this large Angraecum now for 3 years. It refuses to spike and bloom. I have set it outside in the summer heat in filtered sunlight and left it out until fall temps get down into the 40s. Then bring it into my sun room where other orchids bloom and do well. I have an A.sesquipidale that has bloomed several times. This large angraecum keeps putting on new leaves, but the dang thing will not bloom. My sun room is set up to be approx. 7-10 degrees cooler at night than the day. I water and feed it properly I think. I'm perplexed and out of ideas. Any suggestions or thoughts on this species??? Im about ready to give it to a friend to see if she can coax into blooming. thanks

Pokey aka Paul