error in saproot.sh

hi

just today i update kernel patch to 137(not latest) but when i run saproot.sh it show below:

1. ./saproot.sh DEV

The database environment must be set for your DB6 database.

Login as <sid>adm and do 'su root' before starting this script

or

specify the correct name of the installed system

if <SID> does not match the current saproot input parameter DEV

#

why it show this error i use correct name of system, it is DEV, i run this command from /sapmnt/DEV/exe using root user, pls help me