Fix errors on magneto site

We're having a few problems with our Magento website: [login to view URL] We moved from testing directory to the root directory, everything seems to work fine except that there is a problem with the database regarding customers, they cant register on the front end, they get the following message when trying to log on: "Associate to Website" is a required value. On the backend we get the following error: Fatal error: Call to a member function setRenderer() on a non-object in /home/thelrcou/public_html/app/code/core/Mage/Adminhtml/Block/Customer/Edit/Tab/[login to view URL] on line 77 This is beyond my level of knowledge and we really need it fixing quickly so can anyone help? I NEED THIS FIXED ASAP.