[HELP] Fedora Core 4 Zaptel compilation

When I make clean; make linux26 I get:

make -C /lib/modules/2.6.14-1.1637_FC4/build SUBDIRS=/root/zaptel-1.2.0-rc2 modules
make[1]: Entering directory /usr/src/kernels/2.6.14-1.1637_FC4-i686/kernel' make[1]: *** No rule to make targetmodules’. Stop.
make[1]: Leaving directory `/usr/src/kernels/2.6.14-1.1637_FC4-i686/kernel’
make: *** [linux26] Error 2

I’ve also tried this with 1.0.9 and 1.20rc1, so clearly the problem is with my Fedora Core 4 configuration.

I’ve tried to closely folllow the tips at http://www.voip-info.org/wiki-Asterisk+Fedora+Core+3 exept I haven’t yet installed the Digium card. I have generated the symlink to /lib/modules/uname -r/build/
which in my case is:

ls -al /usr/src/linux-2.6

lrwxrwxrwx 1 root root 37 Nov 12 12:25 /usr/src/linux-2.6 -> /lib/modules/2.6.14-1.1637_FC4/build/

I would be grateful for your help.