Server Administration :: Unable To Grant SELECT Priv To ROLE?

i have created one user SVC_LAMR and created one ROLE - SVC_LAMR_ROLE.

i have attachd this role to abv user SVC_LAMR.

i need to grant SELECT privilege on some tables ( from some other schema TPAOWNER ) to this role.so that this user SVC_LAMR can access those tables lying in TPAOWNER schema.

for e.g.

SQL> show user
USER is "SYS"
SQL> grant SELECT on TPAOWNER.USER_APPLICATION to SVC_LAMR_ROLE;
grant SELECT on TPAOWNER.USER_APPLICATION to SVC_LAMR_ROLE
*
ERROR at line 1:
ORA-01031: insufficient privileges

But, if i connect this user: TPAOWNER, and give SELECT privilge directly to this role, it is accepting.

i.e.

SQL> conn tpaowner/*******
Connected.
SQL> grant select on USER_APPLICATION to SVC_LAMR_ROLE;

Grant succeeded.

SQL> grant SELECT on USERS to SVC_LAMR_ROLE;

Grant succeeded.