Need help with an xt:commerce site. Urgent!

Hello every one. I have moved an xt:commerce installation from one server to another. copied 1:1 all the files and also the database. But still get some errors like: Fatal error: Cannot use string offset as an array in .../includes/[login to view URL] on line 61 The old installation workes just fine. Nothing hast changed, except, the domain. But I adjusted the domains and paths in the includes/[login to view URL] and admin/includes/[login to view URL] It still doesnt work. What am I doing wrong? Any help will be appreciated and if its quick enough there will be bonus! Thanks a lot!