I've tried that already with the same results. The problem seems to appear no matter the alsa modules are loaded or not. Compilation goes ok, insmod too, then I start kppp and dial my ISP's number, and then while dialing the system freezes absolutely.
A possible solution might be trying with the 2.6 kernel wich includes support for this modem;
I'm following the instructions from http://www.desktop-linux.net/debkernel.htm
I'm doing it right now, but I'm stuck with the command make xconfig so I'm in need of help (here's the output of 'make xconfig'):

Code:
root@jetway-via:/usr/src/linux# make xconfig
  HOSTCC  scripts/basic/fixdep
En el fichero inclu?do de /usr/include/sys/socket.h:35,
                 de /usr/include/netinet/in.h:24,
                 de scripts/basic/fixdep.c:107:
/usr/include/bits/socket.h:305:24: asm/socket.h: No existe el fichero o el directorio
make[1]: *** [scripts/basic/fixdep] Error 1
make: *** [scripts_basic] Error 2
root@jetway-via:/usr/src/linux# make gconfig
  HOSTCC  scripts/basic/fixdep
En el fichero inclu?do de /usr/include/sys/socket.h:35,
                 de /usr/include/netinet/in.h:24,
                 de scripts/basic/fixdep.c:107:
/usr/include/bits/socket.h:305:24: asm/socket.h: No existe el fichero o el directorio
make[1]: *** [scripts/basic/fixdep] Error 1
make: *** [scripts_basic] Error 2
Could anyone tell me what am I doing wrong here?
Thanks for the replies!