It amazes me how you can lose 21% on this from your buy date of 7/29/13 to your sell date of 8/14/13. The price drop in that same timeframe was only 3.2% and that assumes you bought at the intra-day high of 12.64 on 7/29 and sold at the intra-day low of 12.15 on 8/14. Perhaps you missed the concept that leveraged muni's are for tax free income and not capital appreciation. Particularly in the face of raising interest rates.
I'd recommend you spend a bit more time on your DD. Better luck on your other investments.