Mac OS X 10.7 Cannot connect to app store

Hello, my Mac running OS X 10.7 will not let me connect to App Store. I open the App Store it loads for about 5 second then says “cannot connect to App Store” none of the tabs even over IE, favorites and update tabs. I’ve tried SSL, I’ve tried the keychain method, I’ve tried a different network, I’ve tried date and time method, I’ve check that the App Store servers are up, I’ve tried reinstalling, my software is updated as far as possible, I’ve tried restarting my Mac. I’ve ran out of options nothing will work.