Shell Programming and Scripting

My sh scripts is :

sqlplus -S "user/pwd@server" <<!!
SET SQLPROMPT
exec IN_PROC_TEST;
!!

It prompt 'PL/SQL procedure successfully completed.' but not execute actually

I run this procedure in sqlplus, no problem
and I also could execute simple DDL in this sh script, but why could not execute this procedure in sh?

Thanks a lot!

oh!

on problem run this in sqlplus locally
however,after logon remote server and run this in sqlplus, also prompt ''PL/SQL procedure successfully completed',but no run actually

Error Prompt:
SQL> BEGIN
2 EXEC IN_PROC_TEST;
3 END;
4 /
EXEC IN_PROC_TEST;
*
ERROR at line 2:
ORA-06550: line 2, column 6:
PLS-00103: Encountered the symbol "IN_PROC_TEST" when expecting one of the
following:
:= . ( @ % ;
The symbol ":=" was substituted for "IN_PROC_TEST" to continue.