Hello , I have a little problem on my forum I post a picture when it appears in a bbcode here Screenshots ?
Check the settings of your subforums. There are checkboxes "Enable MyCode". Check if it is activated in Admin-CP -> Forums & Posts -> Edit Forum -> Yes, allow MyCode in posts
EDIT: The MyCode for images is as follows:
[img]google.png[/img]
It looks like you're using the wrong BB codes.
The correct would be:
[img]http://imgurl.com/img.png[/img]