[Pgpool-general] Problem with Streaming Replication Setting

[Efraín Déctor Hernández]

Hello:

I'm following this manual: 
http://pgpool.projects.postgresql.org/contrib_docs/simple_sr_setting2/index.html

But when I start pgpool from the web I can't see information about the 
master node, and a i get this error message:

2011-03-29 10:53:29 ERROR: pid 63942: check_replication_time_lag: SELECT 
pg_last_xlog_receive_location() returns no data

I don't know what is wrong. Thanks in advance.