Help on Dahdi Drivers

I have a slackware 12.2 machine in which I try to install the latest dahdi complete drivers . I execute the next commands

  1. make all
  2. make install
  3. modprobe dahdi
  4. modprobe wcfxo

Everythin ok , but when I reboot my machine the dahdi drivers are not loading . The output of lsmod command show that there is no dahdi or wcfxo module .

What else can I do ?

Thank you