I Can't add node of a custom content type I have to add a new content type to my site for a new feature i'm asked. I already added two of them before (very early in the building of the site, in fact) and it worked well but this time, when i want to add a new node, my new content type doesn't appear in the list of content types (node/add).

It appears in the admin/structure/types page but not in the node/add.

I cleared the cache and rebuild permissions but nothing happened.

I also tried to create a very basic new content type but it didn't appear either.

An earlier exchange on this forum showed it wasn't likely to be the taxonomy access control module.

If I do a clean install of drupal and create a new content type, it works but on my site, i can't do it so i don't think it is because i forgot some step.

May it be because of some problem with a third party module ?

I don't think i have installed very exotic ones but i have some (CKEditor, Taxonomy access control, Piwik Web Analytics... )

I'm turning mad so if someone has some clue, it may really help.

Thank you
After following clues mentioned in the above comments (by CodeNext), I was able to solve my problem. The issues and the solution I have compiled as below.

There were two problems.


For some needed reason, I displaced the "add content" menu from "Navigation" to "Redaction" (a new menu). This caused the new content type not appear in the "Add content" page. By displacing the new content type in the "add content" menu, I could see my new content type in the right place.
I had a underscore in the content type machine name. Because of this, i couldn't navigate to the node/add/newcontenttype page (I reached the node/add page). By removing it (the underscore), everything goes now the right way.