htaccess to force new website content to show?

I’m having a strange problem – strange to me anyway, since I’m not sure why it’s happening.

I have a new published page which I have published and added to the menu. I added it by selecting the “Our Listings” page and adding it to the menu, but instead of adding the “permalink” which was “our-listings” it added a “?pageid=122” link. So instead I added a custom link, which I thought worked.

But I had to refresh the page to get it to show… but now the client only sees the old “page not found message”.

Will using a htaccess command solve that problem? Or is there some setting in the theme I’m not aware of? Go to http://chilliwackgatedcommunities.com/our-listings — do you see the listings?