Get a new power supply, it's not worth the risk. As well as pouring too much voltage in, the polarity could be wrong, pedal supplies tend to use reverse positive / negative setup to most other devices.
I recommend this one, it'll have enough juice to power a whole board full of pedals via a daisy chain if you decide to get more later:
[url="http://www.johnnyshredfreak.com/store/index.php?main_page=product_info&products_id=12"]http://www.johnnyshredfreak.com/store/inde...;products_id=12[/url]