Redmine

hi ,
i had deployed redmine-1.2.1 on 192.168.1.100 and postgresql 9.x on 1.101 servers.every things works smooth.But when ever i stop postgresql , i need to start webrick each time on redmine server.

 #/etc/init.d/postgresql-9.1 stop

Then i lost redmine connectivity .
So i have restart webrick using given method
#pidof ruby
#kill <PID> -9
#kill -9 9619 9614
#cd /var/www/redminedjtk && /usr/bin/ruby script/server -d webrick -e production
#cd /var/www/redmine-1.2.1 && /usr/bin/ruby script/server -d webrick -e production

After running above commands my redmine connectivity renew.But i want webrick connects automatically . ??
waiting for acknowledgement.