can someone show me how to hack this please

hey can someone please show/tell me how to hack this site please kematents.com this is what i got

Failed to process request. Please report to Administrator

Warning: fopen(/var/www/customerdb/lib/logs/postgre_sql_errors.log) [function.fopen]: failed to open stream: No such file or directory in /var/www/codebase/lib/QueryControl.php on line 17

Warning: fwrite(): supplied argument is not a valid stream resource in /var/www/codebase/lib/QueryControl.php on line 22

Warning: fclose(): supplied argument is not a valid stream resource in /var/www/codebase/lib/QueryControl.php on line 23

i dont no were to go from here please help me

Start by reading this sites TOS, you can't talk about hacking here. You may want to use the edit button so you don't get banned with your first post.