Oracle database 10g automatic startup/shutdown

Dear All,

We have database oracle 10g installed under linux 4 update 6. Since last 6 years our automatic startup and shutdown script was running fine. Due to some security reasons we change the following parameter in sqlnet. ora from NONE to NTS after that the database automatic startup and shutdown script is not working. We change the parameter to lock the / as sysdba direct login.

SQLNET.AUTHENTICATION_SERVICES= (NTS)

Kindly provide me the solution to automatic startup and shutdown due to which we are facing lots of problem