crontab does not work

I have following script, which works manually, but not from crontab

#!/bin/bash

export TMP=/tmp

export TMPDIR=$TMP

export PATH=/usr/sbin:/usr/local/bin:$PATH

export ORACLE_UNQNAME=orauat

export ORACLE_SID=orauat_2

export ORACLE_BASE=/u01/app/oracle

export ORACLE_HOSTNAME=******.net

export ORACLE_HOME=/u01/app/oracle/product/11.2.0.4/dbhome_1

#ORAENV_ASK=NO

#. oraenv

#ORAENV_ASK=YES

# Stop Database

sqlplus / as sysdba << EOF

SHUTDOWN IMMEDIATE;

EXIT;

EOF