Sharing is helping.

We offer you this space to share your knowledge about Magento and learn from our experienced customers.

    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.