Autocomplete <TAB> on Postgres7.4beta5 not working?

Hi all
I'm esperiencing problem with the <TAB> autocomplete on
postgres 7.4beta5:

#select * from pg_l<TAB><TAB>
and no suggestions out.


On postgres 7.3.4:

#select * from pg_l<TAB><TAB>
pg_language     pg_largeobject  pg_listener     pg_locks



am I wrong ?



regards
Gaetano Mendola