[Plugin: ebayStore] Made a page, doesn’t do anything?

what am i doing wrong? i installed the plugin, added the code to a page (even tried it on a blog post) and nothing 🙁

it just makes it as a post..

[ebaystore:53251453]

any help would be great thanks.

http://www.cjcollectables.com/c-j-collectables-ebay-store/