Need Magento Expert to Help Debug Magento Error

I have a backup of a magento store. I've got the sql files and have managed to install magento locally on my computer. but when i try to log into the admin section it gives me the following errors: I need someone to help me debug the error so I can log into magento and export all my customer data to csv. #0 /Users/ken/Projects/magento/app/code/core/Mage/Core/Model/[login to view URL](950): Mage::exception('Mage_Core', 'Invalid website...') #1 /Users/ken/Projects/magento/app/code/core/Mage/Core/Model/[login to view URL](465): Mage_Core_Model_App->getWebsite('5') #2 /Users/ken/Projects/magento/app/code/core/Mage/Tax/Block/Adminhtml/[login to view URL](150): Mage_Core_Model_Store->getWebsite() #3 /Users/ken/Projects/magento/app/design/adminhtml/default/default/template/tax/[login to view URL](31): Mage_Tax_Block_Adminhtml_Notifications->getWebsitesWithWrongDiscountSettings() #4 /Users/ken/Projects/magento/app/code/core/Mage/Core/Block/[login to view URL](241): include('/Users/ken/Proj...') #29 {main}