Can't Write to PostGIS PostGreSQL database via psycopg2

[David Michael Schruth,]

Hi,

I am sort of in a jam here. I am using the PsycoPG2 library to read
data out of a windows XP based PostGIS / PostGreSQL database but I am
apparently unable to write (update or insert) even though I am able to
read (select)

I am using PsycoPG2 2.0.6 (psycopg2-2.0.6.win32-py2.5-pg8.2.4-
release.exe )
with Python 2.5 (python-2.5.msi)
and PostGres 8.2.5.-1 (postgresql-8.2.5-1.zip)
and PostGIS 8.2 (postgis-pg82-setup-1.3.1-1.exe)

I can use PGadminIII to paste the same SQL queries and execute just
fine, but when I try to execute them via python code like

import psycopg2
conn = psycopg2.connect("dbname='postgis' user='postgres'
host='localhost' password='12345'")
c=conn.cursor()
c.execute("""INSERT INTO thetable (name) VALUES ('asdf');""")
c.execute("""UPDATE thetable SET name = 'somename' WHERE id = 321;""")
print(c.statusmessage)
#returns "INSERT 0 1" and "UPDATE 0" respectively

It gives me very specialized table specific error messages if the
query is wrong, but when it's correct, it does nothing and doesn't
update. The only way I can update is pasting the query into the
PgAdminIII query window.

This is a problem on two separate machines (XP and Windows 2003
server) with all of the above components installed by two different
people.

Any help on this would be greatly appreciated.

Thanks in advance,

Dave