Pulling too much power from a 9V battery?
That is way too much. Typical battery life table shows 500 mAh capacity. That means 0.5 A for 1 hour. Or 3 A for 10 minutes. That's not even counting on somehow going up to 15 V, and that is also assuming the battery doesn't catch on fire from such a fast discharge.

So the basic answer is: Don't even try it.

You need a much larger power source, or a design that requires a lot less power.