Magento

Hi, I try to use my own theme but it seems that magento won’t load the theme. I’v changed the default theme in the administration area but nothing happens. I can switch theme only if I edit:

magento-1019870/app/code/core/Mage/Adminhtml/etc/config.xml

I don’t think this is the only way. In the older version of magento (0.9) it works fine.

Any help please ?