Warning: include_once(Mage/Core/functions.php) [function.include-once]: failed to open stream: No such file or directory in /home/proled/public_html/proshow/app/Mage.php on line 49

Warning: include_once() [function.include]: Failed opening 'Mage/Core/functions.php' for inclusion (include_path='/home/proled/public_html/proshow/app/code/local:/home/proled/public_html/proshow/app/code/community:/home/proled/public_html/proshow/app/code/core:/home/proled/public_html/proshow/lib:.:/opt/php53/lib/php') in /home/proled/public_html/proshow/app/Mage.php on line 49

Fatal error: Call to undefined function is_dir_writeable() in /home/proled/public_html/proshow/app/code/core/Mage/Core/Model/Config/Options.php on line 214