if else condition failing with error

I have put if else condition in side a ksh scripts its very simple condition but i m not sure why its failing.

expression is like that

ORACLESID=echo $ORACLE_SID if [$ORACLESID="KFBACRMW"] ; then export ORACLE_HOME=/u01/app/oracle/${ORACLE_SID}/dbhome fi

export PATH=$ORACLE_HOME/bin:$PATH

-----------------------------------Its setting default home its not picking mention home in condition "ORACLE_HOME=/u01/app/oracle/${ORACLE_SID}/dbhome"

giving error :

ORACLESID=KFBACRMW

• [KFBACRMW=KFBACRMW] dba_pre_snap_test.ksh[34]: [KFBACRMW=KFBACRMW]: not found