Hello dear Takayuki Miyoshi,
I would ike to report a little problem with the contact form 7 plugin for wordpress:
When I activate the plugin, my custom post type "Testimonials" disappears from my wordpress menu in the backoffice...but the custom posts still appear in the front end.
Please check these screenshots for more help:
- when plugin is deactivated:
- when plugin is activated:
Hope you can resolve this issue soon, I really like your plugin!