L2TP over IPSec

[Citylight]

Hi ! I try to install L2TP over IPSec for a few dialup user like it is described in the Fortinet document: [link=]http://docs.fortinet.com/fgt/handbook/fortigate-ipsec-40-mr1.pdf[/link] On page 143 they told me to make the VPN a transport-mode VPN by entering: config vpn ipsec phase2 edit dialup_2 set encapsulation transport-mode end but the CLI doesn' t accept ' set encapsulation....." and so only Phase1 is working. I am using V4.1.4 on a 300A. What is my mistake ? Thanks, Citylight