Adult sized fleet enemas, one per night for three nights in a row. During the same three days, take Dulcolax laxatives (bisacodyl sodium, 5 mg) as directed on the box. You will want to take Pepcid, Prevacid, or Prilosec with each dose of the laxative, as it can irritate the pouch.
Assuming that gets things moving nicely (which it SHOULD), half the dose of the Dulcolax for a week, but DON'T stop taking it - things will grind to a halt again. Then stop the dulcolax but replace it immediately with a stool softener (Dulcolax makes that, too, but there are LOTS of brands) and take as directed for a week, without fail.
You will also want to, along with the stool softener, start supplementing the fiber in your diet. You'll want to be getting at least 50 g per day. If you can get this through roughage and beans and fruits and vegetables, great. If not, slowly start adding Benefiber to your diet. Do NOT start at a large dose. Start at 1/4 of the recommended dose, and slowly increase it over the course of a week or so until you are at the full dose, and then keep it up.