MyBB Community Forums

im using this plugin on my first template it fits well, now i have my new one it doesnt work correctly.

here is the link to the plugin:
http://mods.mybb.com/view/sceditor-wysiwyg-editor

as you can see the images above is not correctly made, can someone help with the size isssue?

if someone doesnt known how to fix it where can i find the mybb one?
kind regards,
Michael.

is there anyone on mybb does known this problem, im waiting that someone can helps me with it!