[LAU] jack rate stuck to 48khz

Hi, since a couple of month i cant use 88200 and 96000 hz anymore . I tried older version of my kernel, alsa-lib, alsa-firmwares and jack. That doesnt change anything. My sound card is an echo layla3g. In the message box of qjackctl i can read this: /usr/bin/jackd -R -P89 -dalsa -r88200 -p512 -n2 -D -Chw:1,0 -Phw:1,0 -i8 -o8 -Xseq jackd 0.116.2 Copyright 2001-2005 Paul Davis and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcme to redistribute it under certain conditions; see the file COPYING for details JACK compiled with System V SHM support. loading driver .. 03:44:37.021 ALSA active patchbay scan... apparent rate = 88200 creating alsa driver ... hw:1,0|hw:1,0|512|2|88200|8|8|nomon|swmeter|-| 32bit control device hw:1 configuring for 88200Hz, period = 512 frames (5.8 ms), buffer = 2 periods ALSA: final selected sample format for capture: 32bit integer little-endian ALSA: use 2 periods for capture ALSA: final selected sample format for playback: 32bit integer little-endian ALSA: use 2 periods for playback but qjackctl and #cat /proc/asound/card1/pcm0p/sub0/hw_params shows rate: 48000 (48000/1) I dont understand what have changed. Any ideas what's going on here? Thanks, Guillaume