how to start authomatic sap on linux

hi all.

i have portal 7.3 cluster on unix .

my profile are:

scs

defualt

j00

-----

i want to start authomatic the sap when the server are reboot .

i add the parameter - Autostart = 1 - in the defualt profile.

but the sap does not start.

what i need to do more, please?

yossi