Please help compiling Cisco VPN client

When attempting to compile the Cisco VPN client 4.6
under Fedora Core 3, I receive the errors below.
Is there any way to get this to compile correctly?

-Thanks!

zeus:/downloads/vpnclient> make
make -C /lib/modules/2.6.11-1.27_FC3/build SUBDIRS=/downloads/vpnclient modules
make[1]: Entering directory `/lib/modules/2.6.11-1.27_FC3/build'
CC [M] /downloads/vpnclient/linuxcniapi.o
CC [M] /downloads/vpnclient/frag.o
CC [M] /downloads/vpnclient/IPSecDrvOS_linux.o
CC [M] /downloads/vpnclient/interceptor.o
/downloads/vpnclient/interceptor.c: In function `add_netdev':
/downloads/vpnclient/interceptor.c:59: sorry, unimplemented: inlining failed in call to 'supported_device': function body not available
/downloads/vpnclient/interceptor.c:245: sorry, unimplemented: called from here
/downloads/vpnclient/interceptor.c: In function `recv_ip_packet_handler':
/downloads/vpnclient/interceptor.c:607: warning: passing arg 1 of `skb_checksum_help' from incompatible pointer type
/downloads/vpnclient/interceptor.c: In function `do_cni_send':
/downloads/vpnclient/interceptor.c:732: warning: passing arg 1 of `skb_checksum_help' from incompatible pointer type
make[2]: *** [/downloads/vpnclient/interceptor.o] Error 1
make[1]: *** [_module_/downloads/vpnclient] Error 2
make[1]: Leaving directory `/lib/modules/2.6.11-1.27_FC3/build'
make: *** [default] Error 2

somebody wrote:
> When attempting to compile the Cisco VPN client 4.6
> under Fedora Core 3, I receive the errors below.
> Is there any way to get this to compile correctly?

This is not exactly the answer to your question, but still:
I'm just connected to a Cisco VPN Concentrator using FC3. But since I
also failed to install the Cisco VPN client (IIRC with a very similar
error), I switched over to a free alternative: See
http://www.unix-ag.uni-kl.de/~massar/vpnc/ .

Michael