create a PKI admin

Hi,

i have FMG-VM in 5.6.3 version,

i'm trying to create a PKI admin user,

iv'e installed the CA certificate on FMG and the user certificate in the browser (everything work fine when i login to my FGT devices) and created a admin user as PKI user and choose the relevant CA certificate.

the "FMG 5.6.3 admin guide" shows the note "PKI authentication must be enabled via the FortiManager CLI with the following commands: config system global set clt-cert-reg enable end " but unfortunately there is no any "set clt-cert-reg" command, only "set clt-cert-req", after enable this command the login is failed, what more i need to do?

thank you!