On HPUX Itanium,

when I attempt to connenct as sysdba this is the error i get.. I even tried sqlplus "system/manager as sysdba"
I set my $Oracle_Home and $SID but no luck...

Code:
sqlplus "/ as sysdba"

I get ora-1031 insufficient priveledges

cat /etc/group
oinstall::101:oracle

id
uid=101(oracle) gid=101(oinstall) groups=102(dba)