Hello James and everyone else suffering with the same problem, I took the latest stock Suse 9.3 kernel source (2.6.11.4-21.7-smp), compared it with the modifications of Matt's MPPE patch and manually applied the modifications to the kernel source. After compilation, the ppp modules integrated flawlessly into the running kernel! For the first time since the x86_64 release of Suse 9.1, I was able to successfully establish a PPTP VPN connection to the VPN gateway of my company using MS-CHAPv2!!! I also successfully performed several tests with other PPTP VPN gateways. For those desperately seeking for a solution, below is a link to the patch you should apply to the Suse kernel source (I suppose this patch should work also for single CPU kernels) : http://www.boelaert.com/linuxpatches/suse-9.3-x86_64-2.6.11.4-21.7-smp-ppp_m... I will also notify the Suse guys about this issue. Thanks for the tip James (you made my week-end!) and thanks to everyone, especially Matt Domsch, for their contribution towards the final solution! Now, I can start thinking about wiping my Window$ system. ;-) Kind regards, Bart.