Use Shrink To Reclaim Space On Some Tables

I am trying to use shrink to reclaim space on some tables:

-First of all i am using this query to verify which tables are eligible to shrink:
select segment_owner, segment_name, segment_type,
trunc(((allocated_space)/1024)/1024) "aloc",
trunc(((used_space)/1024)/1024) "used" ,
trunc(((reclaimable_space)/1024)/1024) "reclaim"
from table(DBMS_SPACE.ASA_RECOMMENDATIONS()) where segment_owner='&owner' and segment_type='TABLE' order by reclaimable_space desc;

I'll show the toP1 below:

SEGMENT_OWNER SEGMENT_NAME SEGMENT_TYPE aloc used reclaim
-------------------------- --------------------------- ------------------ ---------------- --------
USR_CONTROLFIN CFI_PORTADOR TABLE 744 0 743

Fine, then i shrinked it:

10:06:39 brunos@gf> alter table usr_controlfin.cfi_portador enable row movement;

Table altered

Executed in 0,047 seconds

10:06:57 brunos@gf> alter table usr_controlfin.