How to upload the default checkout procedure in magento

i am trying to fix a magento shop that another developer built. The shop is multilanguage and i see the checkout progress block at step 3. you can watch it here: http://www.ac-sw.net/

I need to return back to the orig开发者_如何学JAVAinal checkout process, i tryed to upload the app/design/frontend/default/default/layout/checkout.xml, and the app/design/frontend/default/default/template/checkout folder without any change.

How can i return back to the default and working checkout procedure?

thanks a lot!

In the Magento admin, you may want to check:

System > Configuration > Design > Themes

In this section clear all the options and make sure Default is set to

default