Hi Rudy. I've heard that complaint before. My mock orange was already here and blooming fine when I bought my house, but I think they take a few years to mature. Also you have to prune prune prune. They are leggy and scraggly like you said, and they only bloom on last year's wood. If I were you, I would cut it back about 1/2 to 1/3, then spend a year or two carefully pruning to encourage lateral growth, and you will probably find that it will bloom once it gets bushy.

Is a couple of years of waiting worth it? Well that's up to you but if you have ever smelled the flowers I think the question answers itself...

If you need more specific pruning instructions just ask. Good luck.