How to acces DVB card

Hello.
I have a Hauppauge Nova HD S2. It seems as if Knoppix 5.1 already knows this card and loads the drivers. See below for results of calls to lsmod and dmesg.
However scan fails. It returns:

>> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
>> main:2247: FATAL: failed to open '/dev/dvb/adapter0/frontend0': 2 No such file or directory

This is correct. There is no /dev/dvb. It can find a folder /UNIONFS/dev/dvb which seems to have all required objects.
Can anybody explain me what is going on?

Thanks a lot
Friedhelm Budnick

root@Knoppix:/# lsmod
Module Size Used by
i915 23168 2
i810 23552 0
drm 78612 4 i915,i810
sworks_agp 13472 0
nvidia_agp 12316 0
ati_agp 13068 0
amd64_agp 16772 0
ali_agp 11136 0
dm_mod 60440 0
ipv6 279616 10
af_packet 29960 0
parport_pc 43492 0
parport 40008 1 parport_pc
8250_pnp 13440 0
8250 28164 1 8250_pnp
serial_core 25216 1 8250
8139too 31104 0
snd_usb_audio 80352 1
snd_usb_lib 20096 1 snd_usb_audio
cx88_blackbird 22532 0
cx2341x 15492 1 cx88_blackbird
cx88_alsa 17192 1
i2c_i801 12044 0
tuner 65064 0
usblp 18432 0
snd_intel8x0 37020 1
snd_ac97_codec 97188 1 snd_intel8x0
snd_ac97_bus 6528 1 snd_ac97_codec
snd_pcm_oss 45728 0
cx88_dvb 21252 0
cx8802 17028 2 cx88_blackbird,cx88_dvb
snd_rawmidi 28064 1 snd_usb_lib
snd_seq_device 12044 1 snd_rawmidi
snd_hwdep 13316 1 snd_usb_audio
mii 9728 1 8139too
cx8800 38156 1 cx88_blackbird
cx88xx 68260 5 cx88_blackbird,cx88_alsa,cx88_dvb,cx8802,cx8800
ir_common 33668 1 cx88xx
tveeprom 19088 1 cx88xx
compat_ioctl32 5504 1 cx8800
cx88_vp3054_i2c 8576 1 cx88_dvb
i2c_algo_bit 12296 2 cx88xx,cx88_vp3054_i2c
dvb_pll 18692 1 cx88_dvb
video_buf_dvb 10756 1 cx88_dvb
dvb_core 82344 1 video_buf_dvb
video_buf 28932 7 cx88_blackbird,cx88_alsa,cx88_dvb,cx8802,cx8800,cx 88xx,video_buf_dvb
btcx_risc 8968 4 cx88_alsa,cx8802,cx8800,cx88xx
snd_mixer_oss 20224 1 snd_pcm_oss
snd_pcm 80004 5 snd_usb_audio,cx88_alsa,snd_intel8x0,snd_ac97_code c,snd_pcm_oss
snd_timer 26500 1 snd_pcm
videodev 29824 3 cx88_blackbird,cx8800,cx88xx
v4l1_compat 18052 2 cx8800,videodev
v4l2_common 26752 5 cx88_blackbird,cx2341x,tuner,cx8800,videodev
snd 55396 17 snd_usb_audio,cx88_alsa,snd_intel8x0,snd_ac97_code c,snd_pcm_oss,snd_rawmidi,snd_seq_device,snd_hwdep ,snd_mixer_oss,snd_pcm,snd_timer
soundcore 12512 1 snd
snd_page_alloc 13960 2 snd_intel8x0,snd_pcm
intel_agp 27420 1
agpgart 36044 8 drm,sworks_agp,nvidia_agp,ati_agp,amd64_agp,ali_ag p,intel_agp
tsdev 11840 0
evdev 14208 2
pcmcia 41132 0
firmware_class 14208 2 cx88_blackbird,pcmcia
yenta_socket 30220 0
rsrc_nonstatic 17408 1 yenta_socket
pcmcia_core 43800 3 pcmcia,yenta_socket,rsrc_nonstatic
cpufreq_ondemand 12300 1
p4_clockmod 10116 0
speedstep_lib 8836 1 p4_clockmod
freq_table 9088 2 cpufreq_ondemand,p4_clockmod
video 19460 0
thermal 17928 0
sbs 18856 0
processor 36200 1 thermal
i2c_ec 9216 1 sbs
i2c_core 25984 8 i2c_i801,tuner,cx88_dvb,cx88xx,tveeprom,i2c_algo_b it,dvb_pll,i2c_ec
fan 8836 0
container 8576 0
button 10768 0
battery 14084 0
ac 9348 0
aufs 88244 1
cloop 18208 1
sbp2 28292 0
ohci1394 38960 0
ieee1394 300760 2 sbp2,ohci1394
usb_storage 73408 1
usbhid 56928 0
ff_memless 9992 1 usbhid
libusual 20624 1 usb_storage
ohci_hcd 24580 0
uhci_hcd 27788 0
ehci_hcd 35848 0
usbcore 135812 10 snd_usb_audio,snd_usb_lib,usblp,usb_storage,usbhid ,libusual,ohci_hcd,uhci_hcd,ehci_hcd
root@Knoppix:/# ls -l /dev/dvb/adapter*
ls: /dev/dvb/adapter*: Datei oder Verzeichnis nicht gefunden
root@Knoppix:/# ls -l UNIONFS/dev/dvb/adapter*
UNIONFS/dev/dvb/adapter0:
insgesamt 0
crw-rw---- 1 root video 212, 1 2006-05-07 23:08 audio0
crw-rw---- 1 root video 212, 6 2006-05-07 23:08 ca0
crw-rw---- 1 root video 212, 4 2006-05-07 23:08 demux0
crw-rw---- 1 root video 212, 5 2006-05-07 23:08 dvr0
crw-rw---- 1 root video 212, 3 2006-05-07 23:08 frontend0
crw-rw---- 1 root video 212, 7 2006-05-07 23:08 net0
crw-rw---- 1 root video 212, 8 2006-05-07 23:08 osd0
crw-rw---- 1 root video 212, 0 2006-05-07 23:08 video0

UNIONFS/dev/dvb/adapter1:
insgesamt 0
crw-rw---- 1 root video 212, 65 2006-05-07 23:08 audio0
crw-rw---- 1 root video 212, 70 2006-05-07 23:08 ca0
crw-rw---- 1 root video 212, 68 2006-05-07 23:08 demux0
crw-rw---- 1 root video 212, 69 2006-05-07 23:08 dvr0
crw-rw---- 1 root video 212, 67 2006-05-07 23:08 frontend0
crw-rw---- 1 root video 212, 71 2006-05-07 23:08 net0
crw-rw---- 1 root video 212, 72 2006-05-07 23:08 osd0
crw-rw---- 1 root video 212, 64 2006-05-07 23:08 video0

UNIONFS/dev/dvb/adapter2:
insgesamt 0
crw-rw---- 1 root video 212, 129 2006-05-07 23:08 audio0
crw-rw---- 1 root video 212, 134 2006-05-07 23:08 ca0
crw-rw---- 1 root video 212, 132 2006-05-07 23:08 demux0
crw-rw---- 1 root video 212, 133 2006-05-07 23:08 dvr0
crw-rw---- 1 root video 212, 131 2006-05-07 23:08 frontend0
crw-rw---- 1 root video 212, 135 2006-05-07 23:08 net0
crw-rw---- 1 root video 212, 136 2006-05-07 23:08 osd0
crw-rw---- 1 root video 212, 128 2006-05-07 23:08 video0

UNIONFS/dev/dvb/adapter3:
insgesamt 0
crw-rw---- 1 root video 212, 193 2006-05-07 23:08 audio0
crw-rw---- 1 root video 212, 198 2006-05-07 23:08 ca0
crw-rw---- 1 root video 212, 196 2006-05-07 23:08 demux0
crw-rw---- 1 root video 212, 197 2006-05-07 23:08 dvr0
crw-rw---- 1 root video 212, 195 2006-05-07 23:08 frontend0
crw-rw---- 1 root video 212, 199 2006-05-07 23:08 net0
crw-rw---- 1 root video 212, 200 2006-05-07 23:08 osd0
crw-rw---- 1 root video 212, 192 2006-05-07 23:08 video0
root@Knoppix:/# dmesg | grep dvb
cx2388x dvb driver version 0.0.6 loaded
root@Knoppix:/#

using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
main:2247: FATAL: failed to open '/dev/dvb/adapter0/frontend0': 2 No such file or directory