jack not working with RME Digi96/8

[altern]

Hi

I am trying to run jack in my desktop, this machine has two sndcards. 
The built-in Intel and a pci RME. Jack works fine with the Intel card 
but it doesnt with the RME.

Otherwise sounds works ok with both snd cards. I am at the moment 
listening to some mp3s with XMMS using the RME output.

$ lspci
00:1f.5 Multimedia audio controller: Intel Corporation 82801BA/BAM AC'97 
Audio Controller (rev 04)
02:0a.0 Multimedia audio controller: Xilinx Corporation RME Digi96/8 Pad 
(rev 05)

$ uname -a
Linux r2d2-desktop 2.6.22-14-generic #1 SMP Sun Oct 14 23:05:12 GMT 2007 
i686 GNU/Linux


and this is the output of jack before it crashes

20:21:06.910 Startup script...
20:21:06.914 artsshell -q terminate
JACK tmpdir identified as [/dev/shm]
can't create mcop directory
Creating link /home/r2d2/.kde/socket-r2d2-desktop.
20:21:07.207 Startup script terminated with exit status=256.
20:21:07.211 JACK is starting...
20:21:07.215 /usr/bin/jackd -R -dalsa -dhw:1 -r48000 -p1024 -n2
20:21:07.241 JACK was started with PID=7809 (0x1e81).
jackd 0.103.0
Copyright 2001-2005 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
JACK compiled with System V SHM support.
loading driver ..
apparent rate = 48000
creating alsa driver ... hw:1|hw:1|1024|2|48000|0|0|nomon|swmeter|-|32bit
control device hw:1
configuring for 48000Hz, period = 1024 frames, buffer = 2 periods
ALSA: final selected sample format for capture: 32bit little-endian
ALSA: use 8 periods for capture
ALSA: final selected sample format for playback: 32bit little-endian
ALSA: use 8 periods for playback
20:21:09.310 Server configuration saved to "/home/r2d2/.jackdrc".
20:21:09.316 Statistics reset.
20:21:09.330 Client activated.
20:21:09.335 Audio connection change.
20:21:09.359 Audio connection graph change.
JACK tmpdir identified as [/dev/shm]
20:21:09.437 XRUN callback (1).
20:21:11.361 XRUN callback (45 skipped).
jackd watchdog: timeout - killing jackd
zombified - calling shutdown handler
20:21:12.932 Shutdown notification.
20:21:12.932 Client deactivated.
20:21:12.935 JACK was stopped successfully.
20:21:12.935 Post-shutdown script...
20:21:12.935 killall jackd
cannot send request type 7 to server
cannot read result for request type 7 from server (Broken pipe)
cannot send request type 7 to server
cannot read result for request type 7 from server (Broken pipe)
jackd: ez da prozesurik hil
20:21:13.171 Post-shutdown script terminated with exit status=256.


any ideas about what can be wrong? i am not an expert in linux audio.

thanks!

enrike