sound on kde startup

[Etienne Gos <gos@noos.fr>]

Bonjour,
I'm using debian 2.2.17-ide potato with kde 2.1.2
Since my last kde-upgrade a few month ago, I don't have any sound during the 
startup of kde, after my login. I don't get any sound neither for incoming 
mail, errors, etc... But sound works great (CDrom, realplayer, netscape with 
flash plugins...).
In KDE Control Center / Sound /  the test of the system bell doesn't work
and Sound Server and Midi give the Error message:
There was an error loading the module.
The diagnostics is : 
(but there is no diagnostic!)

Thanks for your help.
Etienne

KDE System Control Device Manager: (extract)
Audio, video and game controllers:
Creative Sound Blaster AudioPCI64V, AudioPCI128 (Multimedia audio controller)
CD-ROM:
Pioneer DVD-ROM ATAPIModel DVD-104S 011 (CD-ROM drive)

$ dmesg: (extract)
es1371: version v0.22 time 10:46:31 Jun 25 2000
es1371: found chip, vendor id 0x1274 device id 0x1371 revision 0x08
es1371: found es1371 rev 8 at io 0xd000 irq 11
es1371: features: joystick 0x0
es1371: codec vendor   v (0x838476) revision 9 (0x09)
es1371: codec features 18bit DAC 18bit ADC
es1371: stereo enhancement: SigmaTel SS3D

madebian:~# lsmod
Module                  Size  Used by
lockd                  31112   1  (autoclean)
sunrpc                 52420   1  (autoclean) [lockd]
nls_cp437               3908   2  (autoclean)
vfat                    9008   1  (autoclean)
serial                 19564   1  (autoclean)
ne2k-pci                4076   1
8390                    6040   0  [ne2k-pci]
es1371                 25348   0  (unused)
soundcore               2628   4  [es1371]
unix                   10212 141  (autoclean)

user is in group cdrom and audio