Help (FATAL:Module Zaptel not Found)

i am newbie to asterisk and want to configure an FXO card.
i have a system on which fedora is already installed and works properly.

i have installed zaptel-1.4.3
by using the following commands (i have root privelages)

make clean make and make install commands

and before installing libpri-1.4.0 and asterisk-1.4.6
when i put command
modprobe zaptel

it gives the message "FATAL: module zaptel not found"

why this happens?
kindly help me please.
maani janjua