Crayon syntax button not displayed in visual editor

Hi,
I found an issue on crayon visual editor button. The problem is the button is displayed only in the normal post and not in other type of post.
https://cloud.githubusercontent.com/assets/10370753/6052530/3ac2b91e-acd4-11e4-957d-bf6a676b1e31.jpg

when I try to write a lesson (with sensei WooThemes plugin) button is not shown:
https://cloud.githubusercontent.com/assets/10370753/6052534/486fa9b4-acd4-11e4-9bee-983dabc8edc8.jpg
In the other pages (page, page course etc.) button appears and only in the lesson page button not appears

your plugin correctly work on wordpress post:
http://s1.postimg.org/ga50m3s7j/Modifica_articolo_x_Coding_it_Word_Press.jpg

but on woothemes sensei plugin (only in lesson post type) the crayon button not appear -> http://s3.postimg.org/703855n77/Edit_Lesson_x_Coding_it_Word_Press.jpg

I don’t know if it’s a problem of sensei or crayon, for this I ask your help.

https://wordpress.org/plugins/crayon-syntax-highlighter/