Yeah; I'm with lurkette - sounds like a very high likelihood that you already know what's causing this and she probably should speak to a professional about it, if that hasn't already happened. Sounds like it hasn't, though.
In the meantime, don't put any weight on her [lack of] orgasms and just have fun. It may take years for her to come to grips with it, but trust me... you'll want to be around when she does.
Oh and... worst-case scenario? Don't make it so big and scary. We all bring baggage to relationships - at least you know what hers is and that makes it infinitely easier to deal with than mystery hang-ups.