How do I fix redirect loops in MarketPress eCommerce?

I just downloaded this program/plugin this morning and began to add products. On my website (www.redheadcreamery.com), I can view Store>Products, but when I click on an individual product, this comes up:
The webpage at http://redheadcreamery.com/store/products/womens-redhead-creamery-tshirt/ has resulted in too many redirects. Clearing your cookies for this site or allowing third-party cookies may fix the problem. If not, it is possibly a server configuration issue and not a problem with your computer.
Deleting cookies doesn't do the trick. I'm not completely fluent in Wordpress/HTML, but can easily be instructed. I was simply trying to test out my store so I can start promoting sales.
Any help is appreciated.

Thanks!

Alise