jack / qjackctl

[Johan Meskens CS3 jmcs3]

hello

i installed jack using synaptic
and compiled and installed qjacktcl

when i run qjackctl
and try to start the jack server
 , i get the following messages/error messages

########START
21:49:49.626 Patchbay deactivated.
21:49:50.286 Statistics reset.
21:49:50.346 Could not open ALSA sequencer as a client. MIDI patchbay 
will be not available.
ALSA lib seq_hw.c:446:(snd_seq_hw_open) open /dev/snd/seq failed: No 
such file or directory
JACK compiled with System V SHM support
21:57:36.782 Startup script...
21:57:36.782 artsshell -q terminate
21:57:38.216 Startup script terminated with exit status=256.
21:57:38.346 JACK is starting...
21:57:38.346 /usr/bin/jackd -R -dalsa -dhw:0 -r48000 -p1024 -n2
21:57:38.374 JACK was started with PID=10370 (0x2882).
jackd 0.99.0
Copyright 2001-2003 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
loading driver ..
apparent rate = 48000
creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|
32bit
the playback device "hw:0" is already in use. Please stop the 
application using it and run JACK again
cannot load driver module alsa
21:57:39.034 JACK was stopped successfully.
21:57:40.405 Could not connect to JACK server as client.
########END

any help as to determine what is going wrong ?

thanks
jmcs3