TracTweakUiPlugin doesn't work

[林悠居士]

As the example:

1. Enter trac's Web Admin, select TracTweakUI Admin
2. Add url path(regular expression): /newticket
3. Select /newticket, then select filter editcc
4. Click Load Default, and edit filter javascript, then Save

I have did it step by step, I have loaded the default Javascript and I have saved them. But When I created new ticket,the page doesn't appear "编辑",it has no changes.

The scripts'permissions are 755.

Like that:

drwxr-xr-x 2 www-data www-data 4.0K 03-23 16:59 cluetip
drwxr-xr-x 2 www-data www-data 4.0K 03-23 16:59 datepicker
drwxr-xr-x 2 www-data www-data 4.0K 03-24 10:31 editcc
...

-rwxr-xr-x 1 www-data www-data  655 03-23 16:59 del.png
-rwxr-xr-x 1 www-data www-data  295 03-24 09:45 editcc.css
-rwxr-xr-x 1 www-data www-data 2.2K 03-24 09:45 editcc.js
...

And My URL path is /newticket,and I also tried ^/newticket, /(new)?ticket, all of them didn't work. I looked over the log, it said that:

Trac[env] WARNING: base_url option not set in configuration, generated links may be incorrect

What can I do next? Please help me, Thank you, Dear!