Linux user www-data has no access to amphora2 DB

Hi pgsql-admin,

 i want to install the amphora2 light groupware software under Debian Woody
 with pgsql 7.2.1. I have to restore a dump into the amphora2 DB that
 i created before.:
-----------------
testlinux:/home/amphora2/inst# su  www-data -s /bin/bash -c 'psql amphora2 < amphora2.0.dump'
-----------------

but postgres tells me:

-----------------
psql: FATAL 1:  IDENT authentication failed for user "www-data"
-----------------

my pg_hba.conf:

local        amphora2   ident           amphora
local        all                                           ident sameuser
host         all         127.0.0.1     255.0.0.0           ident sameuser
host         all         0.0.0.0       0.0.0.0             reject


--
Mit freundlichen Grüssen
Denny-Schierz                          mailto:cuall@gmx.de