Error with Chrome

Hi,
I am using several plug-in in my blog.
I use WP-dtree to manage my categories
and Tinymce-richtext to be my HTML editor.

But when I browse my blog and try to reply post,
the post editor won’t show.
It’s only happened by browsing in Google Chrome.
I open the develop tool of Chrome, there is somee error message
as follow:

Uncaught TypeError: Cannot read property ‘pid’ of undefined wp-dtree.min.js:1
Failed to load resource: the server responded with a status of 404(Not Found)

Sorry, I am not a programmer. I don’t understand what happen?

Did anyone have the same problem?
Please help me. Thank you!

http://ww.wp.xz.cn/extend/plugins/wp-dtree-30/