I closed the previous thread as you asked.
I open this one .
I have updated to the new marketpress version and installed the 3 php files you sent me.
The problem still remains. I cannot edit the product attributes ( http://cbespritfrintegration.apps-1and1.net/boutique/wp-admin/admin.php?page=store-settings-productattributes&action=mp_edit_product_attribute&attribute_id=5 )
why does it work on your test site and not on mine anymore?
The login credentials are the same.
Thanks to have a look.