Have you actually tried that it does not work in Windows XP?
Client 5.4.1 is listed as compatible with XP in release notes too, so if you open a support request we can provide that to you.
Thanks for your reply.
I have find the compatible version but I cannot download it in my download center...
I can only choose the 18.104.22.1688 or 5.9 IPSec VPN client. So I really need to download a VPN Client for Windows XP!!!
Do you have a link to download archive version of the client?
Unfortunately there is no download location for old VPN client versions. As said, if you open an SR, we can provide it to you directly.