Linux and zaptel are not same version

I have Linux Suse 8.2 on AMD Duron 1400.
Linux Kernel version is shown to be Linux 2.4.20-4GB.athlon. I tried to install zaptel and it was OK … and try
modprobe wcfxo
i have got massage
Zaptel is intsled for 2.4.20-4GB but this is 2.4.20-4GB
What is problem?

a typo or does it report as you’ve shown ?

do you have a difference between the kernel you’re running and the kernel source/headers you have available ?