dont try to program it, try to fill it with energy,love and light, and then send it somewhere on your body and feel the effects of it.
U can put all your love into it and heal someone, or u can put all your hate and kill someone, be carefull pls..
It might be that you need to work on your energy a little more. Try working with it in little amounts for a while, and build from there. Also be sure to replenish your energy (I do so by connecting with nature's energy), so you aren't completely drained.
Also, programming a psi ball can be as simple as putting your will into it. Try with that after you have practiced with your energy for a while.