I am facing problem in creating Database on Linux 6.2. I am going to install Oracle 8.1.5

I have installed the Oracle Successfully and now i am trying to create the database manually. When i am executing the script it is giving error in the beginning itself and not starting the database with nomount .

command given is,

startup nomount pfile = ......

Error :-- ORA - 00439 Feature not enabled : managed Standby

i have checked the oracle error 439 it is saying don't try with this, feature not enabled.

Can anyone tell me where is wrong and what to do ??