juniper VPN disconnect when I use SCP

view story

http://serverfault.com – I am using Juniper in my company. I have a 64 bit Ubuntu 12.04 laptop. I can ssh to remote servers, and do everything well. My problem is : whenever I scp something to the remote server, Juniper disconnect me from the VPN so that I am disconnected from the servers. Do anyone has that problem before ? Can you help me fix it. Thank you very much, (HowTos)