Kernel Sources / Headers

Ola, Pessoal.
Estou com um problema ao tentar montar NTFS atraves do captive.
Exibe a seguinte mensagem de erro :
Captive NTFS v1.1.5. Check a new version at: http://www.jankratochvil.net/
Preparing LUFS kernel module... Run /usr/share/lufs/prepmod if problems occur.
lufs module not loaded: Try running /usr/share/lufs/prepmod to see more. at /usr/bin/captive-lufsd line 180

Ai, eu executo :
/usr/share/lufs/prepmod

no final de tudo a mensagem acusa :

Failed to prepare lufs.o module for your Linux kernel 2.4.20.
Detected Linux kernel sources "/lib/modules/2.4.20/build" do not appear to be valid.
Please install kernel-source-x.y.z.i386.rpm or kernel-headers_x.y.z_i386.deb.
The following directory paths were search (first existing directory used):
/lib/modules/2.4.20/build
/usr/src/kernel-headers-2.4.20
/usr/src/linux-2.4.20
/usr/src/linux-2.4.20
/usr/src/linux
/usr/src/kernel-source-2.4.20

Acontece que eu baixei o kernel sources ( que se encontra em /usr/src/linux-2.4.20 ), e o kernel headers (/usr/src/kernel-headers-2.4.20), estao os 2 descompactados la e nao entendo por que diz que o meu kernel sources e invalido.
Alguem tem alguma ideia?

Valeu,
Daniel Jordao