One of the reasons you cannot connect with user Administrator is that the database is not correctly configured. If this is the case you will find some meaningful error messages in the logs [1].

Did you follow this documentation : http://doc.nuxeo.com/x/fwQz

[1]: I created an answer entry to explain how to find it here.

Bjalon points to the full tuning of postgresql which you should absolutely follow-up on.

Based on the fact you are getting only 48 tables created and you can't login, my experience is that you need to ensure (1) plpgsql is enabled on the database (s/b ddflt for 9.x but not for 8.4), and (2) ensure that the database has implicit casts set…

CREATE FUNCTION pg_catalog.text(integer) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(int4out($1));'; CREATE CAST (integer AS text) WITH FUNCTION pg_catalog.text(integer) AS IMPLICIT; COMMENT ON FUNCTION pg_catalog.text(integer) IS 'convert integer to text';

CREATE FUNCTION pg_catalog.text(bigint) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(int8out($1));'; CREATE CAST (bigint AS text) WITH FUNCTION pg_catalog.text(bigint) AS IMPLICIT; COMMENT ON FUNCTION pg_catalog.text(bigint) IS 'convert bigint to text';

This should allow you to login… even if you don't undertake all the other tuning steps immediately.