Keep getting 404 error

I installed WordPress at a TEST site … http://www.RoundHouseFarm.com/wptest/
then added products to the catalogue … I added [wp-catalogue] short code to the page WP CATALGUE … the 2 products show up … BUT
when I click on either picture OR the category link … I get a 404 error ….

http://ww.wp.xz.cn/plugins/wp-catalogue/