Fatal error: Class 'Mage' not found in Magent store

Please help to make this program to run, it was running from former ISP ========= require Mage::getBaseDir('code') . DS . 'local' . DS . 'Company' . DS . 'IntegrationUI' . DS . 'Helper' . DS . 'Process' . DS . '/[login to view URL]'; class Company_Client_Helper extends Vaimo_IntegrationUI_Helper_Process_IntegrationBaseClass { public function import() { $header[0] = 'order_number'; ====== atal error: Class 'Mage' not found in /app/code/local/Company/Client/Helper/[login to view URL] on line 31