Networking :: how to get FRITZ!Card USB v2.1 to work

hello.

problem:
i want to use an AVM FRITZ!Card USB v2.1 modem connect to the internet with damn small linux.

what i've done so far:
i downloaded the correct driver from avm and followed the instructions. that means i compiled the kernel with capi-support and i compiled the fcusb2 driver.
after rebooting the modem is recognized by the kernel and i can load the capi modules and the fcusb2 module. so far so good.
now i want to use pppd to establish a dialup connection. and here the trouble begins: if you want to do this, you need the pppdcapiplugin and the libcapi20.so. both are part of the isdnutils, but you cannot install them via apt-get because of module dependencies. ok. so i downloaded the sources and compiled the plugin (which consists of capiplugin.so and userpass.so) and the libcapi20.so manually. after putting the stuff into dsl i booted again and now it seems to work.
but there's still a problem:
when i use the command "pppd call avm" (the "avm" script is used to do a fast connection test to an avm server to check whether the modem works), i get these messages:
-----------
bash-2.05b# pppd call avm
Plugin userpass.so loaded
userpass: $Revision: 1.5 $
Plugin capiplugin.so loaded.
capiplugin: $Revision: 1.36 $
capiconn: 1.10
capiplugin: CAPI_REGISTER failed - CAPI not installed (0x1009) [No such device or address (6)]
------------

so the plugin is looking for a capi device... isn't it?
when i do an "capiinit start" to load the capi modules it get this error:
-----------
bash-2.05b#capiinit start
ERROR: cound't mount capifs on /dev/capi
-----------

this is maybe because /dev/capi is just a symbolic link to /KNOPPIX/dev/capi but when using "mount" i get this:
----------
/dev/root on / type ext2 (rw)
...foobar
capifs on /dev/capi type capifs (rw,mode=0666)
----------

so, that looks ok for me, but where does the error come from? and why doesn't pppd work?
can anyone of you tell me what i've done wrong? or did i forget anything? does anyone know another possibility to establish a dialup connection? i know about bongosurfer (which needs jre2) or slyLCR (which needs swt and jre2) or optisurf (which needs those damn kde-libs), but any of these can't be installed because of version conflicts or unresolved module dependencies.

now i'm curious if someone can pull a rabbit out of his hat.

EDIT:
no one? is there really no one who was successful with an usb isdn modem?
it would help me VERY much if there's someone who can tell me why i get the error message saying that the capi device is not found but it seems to be mounted correctly.

please help.

greetings

mark

there is a driver of avm now maybe you can do anything with it ;) it is for suse but there is a describtion, how to translate it. If you got it working pls explain how ;)
www.avm.de

original here.