Parameter Passed in Unix to Oracle statement

Hello,

I am trying to call a PL/SQL procedure through unix shell script and I am facing following issue.
ORA-06550: line 1, column 7:
PLS-00201: identifier 'CFDSYSDB.TABLE_LIST_COLUM' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored

My unix script is as below.
echo "Oracle Spooling for ${2} starts"
TableName=${1}

sqlplus -s cfduser/walnut45@acp0cfd <<!
execute CFDSYSDB.TABLE_LIST_COLUM('CFDSYSDB','TCFDR_AGENT' ,'N');
!
User(CFDUSER) has exec privilages on the procedure. When I execute this procedure from SQL developer with same user it is running fine but through unix script it is throwing the error mentioned above.

Thanks in anticipation.