ISPConfig 3 (restart/shutdown/power failure)

Every time I restart/shutdown or in case of power failure my server, I have to do the following to get ISPConfig to work.

Code:

fuser -n tcp 80

I get: 80/tcp: 5738 5739 5740 5741 5742 5743

Code:

kill -9 5738
kill -9 5739
kill -9 5740
kill -9 5741
kill -9 5742
kill -9 5743

sudo /etc/init.d/nginx restart

after I do above steps my server works, however running processes are:

www-data 5739 0.0 0.2 91856 22240 ? S 13:37 0:00 nginx: worker process
www-data 5740 0.0 0.2 91856 21484 ? S 13:37 0:00 nginx: worker process
www-data 5741 0.0 0.2 91856 21484 ? S 13:37 0:00 nginx: worker process
www-data 5742 0.0 0.2 91856 22188 ? S 13:37 0:00 nginx: worker process
www-data 5743 0.0 0.2 91856 21400 ? S 13:37 0:00 nginx: cache manager process

Anyone knows why is this happening after every restart or power failure?

Thank You!

 

Maybe it's a problem with nginx on Debian Squeeze? I haven't seen such problems on Debian Wheezy so far.