Oracle Grant privilege to function

SQL> desc apps.xxta_inter_acces;

FUNCTION apps.xxta_inter_acces RETURNS NUMBER(38)

 Argument Name                  Type                    In/Out Default?

 ------------------------------ ----------------------- ------ --------

 P_SR                           VARCHAR2                IN

 P_TEL                          VARCHAR2                IN

SQL> create user xxalj identified by xxalj;

User created.

SQL> grant connect,resource to xxalj;

Grant succeeded.

SQL> grant select on dual to xxalj;

Grant succeeded.

SQL> conn apps/taapps11i

Connected.

grant execute on apps.xxta_inter_acces to xxalj;

SQL> conn xxalj/xxalj

Connected.

SQL> desc apps.xxta_inter_acces;

FUNCTION apps.xxta_inter_acces RETURNS NUMBER(38)

 Argument Name                  Type                    In/Out Default?

 ------------------------------ ----------------------- ------ --------

 P_SR                           VARCHAR2                IN

 P_TEL                          VARCHAR2                IN

OBJECT_NAME

--------------------------------------------------------------------------------

OWNER                          OBJECT_TYPE

------------------------------ -------------------

XXTA_INTER_ACCES

APPS                           FUNCTION