Directory signup disabled, no page hierarchy

Hi. I’m a wordpress novice and basically a frontend internet user. I’m using the Directory plugin with the Twenty Eleven theme. I also have your Marketplace Lite plugin. It works well. Will likely upgrade it soon. The problem I’m having with the Directory theme is 1) The pages show fine when they have no parent. But that clutters up my top of page menu. So, I tried putting all the Directory pages under the main Listings page. Seems like the program isn’t setup to work with that sort of hierarchy. The page says it “..can’t find what you’re looking for…” 2) When all the pages are not under a parent they work fine except the signup page says that the administrator has disabled the sign up function.

Please advise on how to correct these issues. My site is at http://www.trinichi.com Thanks.