Script no started at bootup

Hello everyone
I created a script to start the server Oscam at boot of YaVDR, to take advantage of my subscription has canalsat.

My oscam script

I change its parameters to execution:

sudo chmod 755 /etc/init.d/oscam
sudo chown root:root /etc/init.d/oscam

I then install by typing the following command:

sudo update-rc.d oscam defaults

then a reboot, but after starting the server is not started, yet when typing this command in the console and it works well.

sudo service oscam start

I've forgotten something, thank you for your help.

Best regard

Rififi77