Adele,
I have found the following exercise helpful for my ITB. It comes from Sports Injury Bulletin, March 2001, by Owen Anderson.
"Stand on a step [4-6 inches high] with your involved leg (the one with the ITB problem). Your legs should be fairly straight as you do this.
"Now, with both knees locked, lower the opposite, non-involved foot and hip towards the floor. As you do so, your involved hip will move upward somewhat, so that it is actually higher than the non-involved hip. Your involved hip should also move a bit in a lateral direction (towards the outside).
"Next, attempt to shift most of your body weight to the inside part of the foot of the involved leg. This simulates the natural pronation of the foot which occurs during the stance phase of runnings, and it also enges and puts tension on your tensor fascia lata and iliotibial band, exactly as it would when you run.
"Bend your weight-supporting involved knee slightly (about 10-20 degrees), but keep the non-involved foot off the ground or floor. Now, move the involved hip forward about 4-6, while keeping the involved heel in contact with the step and your weight on the inside of your involved foot. As you do this, all of the action should be at the hip! Your knee angle should stay about the same thorough the exercise... As your involved hip moves forward, your upper body should move backward. Very key points: as your involved hip moves forward, make sure that it stays in the same lateral position, and also be certain that your involved hip is higher than your non-involved one.
"After you've moved your hip forward, move it straight backward - making sure it goes back 4-6 inches beyond the straight-up, starting position. As your hip moves backward, your upper body will tend to bend forward."
Owen's acticle goes into much more detail, but that is the basic movement. This exercise works because it mimics the running the movement and will strengthen your ITB. Do 10-15 reps every other day.
Let me know if it works for you.
Regards
Mark