problems with later added DDS-2 tape-unit

[Angelo Machils]

Hello there!

I have added a DDS-2 tape-unit on an already installed FC2 system 
(running 2.6.6-1.435 kernel). Although the st mod shows up in lsmod, the 
tape-unit sometimes just 'disappeares' when I try to use it, with for 
example tar.

my lsmod output:
Module                  Size  Used by
usb_storage            53576  0
sd_mod                 16384  0
aic7xxx               135864  0
vfat                    9984  0
fat                    33600  1 vfat
nls_utf8                1536  0
snd_pcm_oss            41000  0
udf                    71172  1
loop                   10760  0
snd_mixer_oss          13824  3 snd_pcm_oss
snd_intel8x0           26796  3
snd_ac97_codec         54788  1 snd_intel8x0
snd_pcm                69256  2 snd_pcm_oss,snd_intel8x0
snd_timer              17284  1 snd_pcm
snd_page_alloc          8072  2 snd_intel8x0,snd_pcm
gameport                3328  1 snd_intel8x0
snd_mpu401_uart         4864  1 snd_intel8x0
snd_rawmidi            17444  1 snd_mpu401_uart
snd_seq_device          6152  1 snd_rawmidi
snd                    39396  11 
snd_pcm_oss,snd_mixer_oss,snd_intel8x0,snd_ac97_codec,snd_pcm,snd_timer,snd_mpu401_uart,snd_rawmidi,snd_seq_device
soundcore               6112  3 snd
vmnet                  25744  12
vmmon                  41656  0
parport_pc             19392  1
lp                      8236  0
parport                29640  2 parport_pc,lp
autofs4                12932  0
sunrpc                109924  1
e100                   25348  0
mii                     3584  1 e100
3c59x                  30504  0
ipt_REJECT              4736  1
ipt_state               1536  7
ip_conntrack           24968  1 ipt_state
iptable_filter          2176  1
ip_tables              13568  3 ipt_REJECT,ipt_state,iptable_filter
floppy                 47440  0
sg                     27680  0
sr_mod                 13220  0
st                     29980  0
scsi_mod               91984  6 usb_storage,sd_mod,aic7xxx,sg,sr_mod,st
microcode               4768  0
dm_mod                 32800  0
uhci_hcd               24472  0
button                  4632  0
battery                 6924  0
asus_acpi               8984  0
ac                      3340  0
ipv6                  184672  10
ext3                  103656  4
jbd                    40728  1 ext3

Any help would be appreciated.

Thanks in advance, Angelo