im getting an error when i go to admin and try to open product with attribute stock under catalog. i get this error.

Warning: require(includes/classes/products_with_attributes_stock.php) [function.require]: failed to open stream: No such file or directory in /home/dscott19/public_html/dealzrus2/admin/products_with_attributes_stock.php on line 12

Warning: require(includes/classes/products_with_attributes_stock.php) [function.require]: failed to open stream: No such file or directory in /home/dscott19/public_html/dealzrus2/admin/products_with_attributes_stock.php on line 12

Fatal error: require() [function.require]: Failed opening required 'includes/classes/products_with_attributes_stock.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/dscott19/public_html/dealzrus2/admin/products_with_attributes_stock.php on line 12

Can someone please help me to fix this Please and steer me in the right direction on how to fix this. Sorry if i posted this twice.

THank you