VPN dropping connection on ubuntu 12.04

[Jatin]

Hi All

I am using ubuntu 12.04 as my desktop for workplace. I need to connect 
to a VPN and then do my work. I installed the "vpnc" daemon as the vpn 
client to connect to the office network. I am facing an issue where in 
after every 15-20 mins my VPN connection fails and i need to re-connect 
again.

Could you someone please help me resolve this issue. Appreciate your 
help in this regard.

Thanks
Jatin