How to setup GIS Server on Debian

Hi everyone,

I tried to setup an GIS-Server on Debian 6 with some installation guides, but it does not work.

I've installed PostgreSQL 8.4, PostGIS & osm2pgsql. But when I start osm2pgsql, it gives an error that some tables are not available:

osm2pgsql -c -s duesseldorf.osm

and the return is

osm2pgsql SVN version 0.69-
Using projection SRS 900913 (Spherical Mercator)
Setting up table: planet_osm_point
NOTICE:  table "planet_osm_point" does not exist, skipping
NOTICE:  table "planet_osm_point_tmp" does not exist, skipping
SELECT AddGeometryColumn('planet_osm_point', 'way', 900913, 'POINT', 2 );
 failed: ERROR:  function addgeometrycolumn(unknown, unknown, integer, unknown, integer) does not exist
LINE 1: SELECT AddGeometryColumn('planet_osm_point', 'way', 900913, ...
               ^
HINT:  No function matches the given name and argument types. You might need to add explicit type casts.

Error occurred, cleaning up

So - where can I get the database-tables?

Thanks,

Alex