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I need some help.
I move a magento installation from one server to other.
Frontend is working ok.
Magento connect is working ok.
Admin panel is not working.
I get this:
Fatal error: Class 'Mage_Hellothemes_Helper_Data' not found in /home/biroshop/public_html/app/Mage.php on line 523
I don't know what other data to give you.
Maybe you can help me to fix this.