Scott, are you growing this plant indoors our out? Temperature and light variations will make Spaths start and stop blooming. Also, I'll bet the re-potting process started yours in its baby-making spree. They sometimes bloom better when they're root-bound, and once all those baby plants get big, it will get crowded and feel comfy again.
I'd go back to a balanced fertilizer until spring, then try the bloom booster again. It's usually futile, and can damage the plant to try to 'force' blooming if it's in a reproduction cycle. It will need the nitrogen component to grow big gorgeous leaves before flowering again.
