PG 9.1 Windows 7 64-bit pgAdmin says all pgAgent jobs fail

I started writing this after struggling and Googling for hours and not 
getting anywhere.  I'm running EnterpriseDB 9.1.2.2 64-bit on Windows 7 
64-bit.  I installed pgAdmin separately, version 1.14.1. The database 
appears to be working fine.  pgAgent was automatically installed and the 
service starts without error.  I see the pgAgent in the Catalog list, 
and Jobs shows in the postgres database.

I'm logged in as user postgres in the postgres database.  I created the 
following table:

CREATE TABLE datetest
(  datestamp timestamp without time zone
)

and populated a single row:

insert into datetest values(sysdate);

I then created a simple test job, of type SQL, with the following 
definition:

update datetest set datestamp = sysdate

I scheduled this to run every 5 minutes.  When I started this email, the 
job just wouldn't run when I said Run Now, and no errors showed up in 
the event log.  I finally remembered from somewhere that Host agent has 
to be empty; sure enough, I removed "localhost" from there and then my 
job ran :(.

So, now the only remaining issue is that in PgAdmin, the Statistics tab 
shows all runs with a status of "Failed".  But the datetest table is 
getting updated properly.  I see no events in the Application event log.  Finally, I ran pgAgent from the command line
inDEBUG mode:
 

DEBUG: Checking for jobs to run
DEBUG: Creating job thread for job 2
DEBUG: Creating DB connection: user=postgres port=5432 
hostaddr=127.0.0.1 password=xxxx dbname=postgres
DEBUG: Allocating new connection to database postgres
DEBUG: Starting job: 2
DEBUG: Sleeping...
DEBUG: Creating DB connection: user=postgres port=5432 
hostaddr=127.0.0.1 password=xxxx dbname=postgres dbname=postgres
DEBUG: Allocating new connection to database postgres
DEBUG: Executing SQL step 3 (part of job 2)
DEBUG: Returning connection to database postgres
DEBUG: Returning connection to database postgres
DEBUG: Completed job: 2
DEBUG: Destroying job thread for job 2
DEBUG: Checking for jobs to run
DEBUG: Sleeping...

The run also shows a status of "Failed".  Any idea why?  Thanks.

-- 
Guy Rouillier