Page/Post Not Found

I’m having a terrible time figuring this out. I know there are threads talking about this already, and I swear I’ve exhausted myself trying to figure it out.

I need some sort of step by step that will help me with the Pretty Permalinks. Everything works fine when the permalinks is set to default.

When I switch it to Post name, it can no longer find my post or my about me page through their urls.

Post: http://healthinthenude.com/happy-new-year/
Page: http://healthinthenude.com/about-me-2/

I’ve tried using the plugin WP htaccess control, but I am not sure I used it right and didn’t find clear instructions for using it to edit the .htaccesss. I’ve downloaded Filezilla. but I get a notification that I’m running it behind a NAT router, and the options available to me don’t match the tutorials I’ve seen. I’ve watched several tutorials on how to create a .htaccess file, and I’ve had no luck getting any of this to work for me.

Can anyone dumb this down for me? I’m at my wits end. Thanks in advance!