Dormant Lycaste

[Jorch]

I have this Lycaste for 2 years now, the name escapes me at this moment, but I believe it's a skinneri hybrid with pure white flowers. I bought it in bloom, and after the flower dropped, it went dormant! No new growth for all of 2007 AND 2008! The p-bulbs are all still firm and green though, and I water them lightly once every 2 weeks to keep them alive. I am baffled! What can I do to wake it up?

My other 3 Lycaste hybrids grow and bloom regularly for me.. I grow them all in a south facing window, intermediate house temperature.

Thanks in advance!