[V8.306]SSL VPN -> Client Gateway-IP is empty

Hello,

I have a problem to setup the VPN SSL in ASG v8.306 in a VM.
If a client has connected to the ASG over SSL VPN they wont get a Gateway IP.
I tested it with the default virtual Pool-IP SSL VPN and a user created one but I dont find the option to set the Gateway IP.

Can anyone help me to find this option?

Thanks @ all
Tarzipan