cisco vpn client 4.7在fc6中的安装问题

log2002

[root@MyHome vpnclient]# ./vpn_install
Cisco Systems VPN Client Version 4.7.00 (0640) Linux Installer
Copyright (C) 1998-2005 Cisco Systems, Inc. All Rights Reserved.

By installing this product you agree that you have read the
license.txt file (The VPN Client license) and will comply with
its terms.


Directory where binaries will be installed [/usr/local/bin]

Automatically start the VPN service at boot time [yes]

In order to build the VPN kernel module, you must have the
kernel headers for the version of the kernel you are running.


Directory containing linux kernel source code [/lib/modules/2.6.18-1.2869.fc6/build]

* Binaries will be installed in "/usr/local/bin".
* Modules will be installed in "/lib/modules/2.6.18-1.2869.fc6/CiscoVPN".
* The VPN service will be started AUTOMATICALLY at boot time.
* Kernel source from "/lib/modules/2.6.18-1.2869.fc6/build" will be used to build the module.

Is the above correct [y]

Making module
make -C /lib/modules/2.6.18-1.2869.fc6/build SUBDIRS=/home/guowj/downloads/vpnclient modules
make[1]: Entering directory `/usr/src/kernels/2.6.18-1.2869.fc6-i686'
  CC [M]  /home/guowj/downloads/vpnclient/linuxcniapi.o
/home/guowj/downloads/vpnclient/linuxcniapi.c:12:26: 错误：linux/config.h：没有那个文件或目录
/home/guowj/downloads/vpnclient/linuxcniapi.c: 在函数 ‘CniInjectReceive’ 中：
/home/guowj/downloads/vpnclient/linuxcniapi.c:292: 错误：‘struct sk_buff’ 没有名为 ‘stamp’ 的成员
/home/guowj/downloads/vpnclient/linuxcniapi.c: 在函数 ‘CniInjectSend’ 中：
/home/guowj/downloads/vpnclient/linuxcniapi.c:432: 错误：‘struct sk_buff’ 没有名为 ‘stamp’ 的成员
make[2]: *** [/home/guowj/downloads/vpnclient/linuxcniapi.o] 错误 1
make[1]: *** [_module_/home/guowj/downloads/vpnclient] 错误 2
make[1]: Leaving directory `/usr/src/kernels/2.6.18-1.2869.fc6-i686'
make: *** [default] 错误 2
Failed to make module "cisco_ipsec.ko".
[root@MyHome vpnclient]#


这是什么原因？