httpd dead but pid file exists in Kloxo Control Panel

You can try the following fixes :-

1) Kill all the Apache process 

# ipcs -s apahe

# ipcs -s | grep apache | perl -e 'while (<STDIN>) { @a=split(/\s+/);print `ipcrm sem $a[1]`}' 

# cd /var/lock/subsys

# rm httpd

# service httpd restart