why does my systemd-services not work?

[Reindl Harald]

independent of the use of Type=simple,fork or oneshot systemd
always kills my services, the process is fired up and "status"
says "deactivating (stop-sigterm)" reuslting in the process is
killed after a short time

if i start the "/usr/bin/mpd" manually as root it starts, drop
permissions (switch to user mpd) and runs in background forever

the same happens with everything i try to migrate from sysv
to systemd except two perl-services :-(

>  [Unit]
>  Description=The Music Player Daemon
>  After=syslog.target
>
>  [Service]
>  Type=fork
>  ExecStart=/usr/bin/mpd
>
>  [Install]
>  WantedBy=multi-user.target 

[root@testserver:~]$ systemctl start mpd.service

[root@testserver:~]$ ps aux | grep mpd
root      4344  0.1  2.5 542804 29988 pts/1    Sl   12:32   0:01 kate
systemd-services/mpd.service
mpd       4557  0.0  1.0 456484 12932 ?        Ssl  12:47   0:00 /usr/bin/mpd
root      4562  0.0  0.0 110668   860 pts/1    S+   12:47   0:00 grep --color mpd

[root@testserver:~]$ netstat -l | grep mpd
tcp        0      0 0.0.0.0:mshvlm              0.0.0.0:*                   LISTEN     
4557/mpd

[root@testserver:~]$ systemctl status mpd.service
mpd.service - The Music Player Daemon
          Loaded: loaded (/lib/systemd/system/mpd.service)
          Active: deactivating (stop-sigterm) since Thu, 16 Jun 2011 12:47:13 +0200; 14s
ago
         Process: 4554 ExecStart=/usr/bin/mpd (code=exited, status=0/SUCCESS)
          CGroup: name=systemd:/system/mpd.service
                  └ 4557 /usr/bin/mpd