Customizing skin

edit

According to the doc http://askbot.org/doc/customizing-skin-in-askbot.html, I try to customize my askbot. I will have 4 askbots on the same server so I decided to create the skin in a new directory.
My process:
- create a new directory 'myskin' in my askbot installation and copy of 'askbot/skin/default' from the sources
- modify the base.html title to see if it's working - modify settings.py with:
ASKBOT_EXTRA_SKIN_DIRS='myskin'
STATICFILES_DIR = (..., ASKBOT_EXTRA_SKIN_DIRS)
- run python manage.py collectstatic
The skin used is allways the 'default' skin... something is wrong ?