First thing, I'm not a doctor. I only play one here on the internet.
In my experience, what I've found with my own battles with the IT band over the years is that the problem comes from tight muscles in the hips and hamstrings. Any occupation or activity that involves a lot of sitting tends to contribute to the tightness in these muscles.
The way I have found to help stretch these muscles out is the "Double Leg Hamstring Stretch". I do this stretch by myself, although I have found some instructions that involve an assist from another person to complete the stretch here:
http://www.fitday.com/fitness-articles/fitness/exercises/how-to-do-an-assisted-h
amstring-stretch.html If your hips and hamstrings are really tight, you may not be able to touch the floor at first, but keep working at it. You also need to keep both feet flat on the floor and hold the stretch for 60 seconds to be really effective. It takes time, but I've found that once I get these muscles more flexible, any problem with IT band pain disappears.
I hope this helps. My bill is on the way.