cisco VPN client causes laptop to freeze

[b-boy]

Hi guys I am using the cisco vpn client to connect to my work network from home, so what i do is start the client with

/etc/init.d/vpnclient_init start

and then connect with

vpnclient connect mywork

then I am asked to accept the disclaimer and i press Y
I get an ip address and then my laptop freezes and the CAPS LOCK light stays on

Please help

I have tried vpnc but I get the following error

vpnc: quick mode response rejected:  (ISAKMP_N_INVALID_PAYLOAD_TYPE)(1) this means the concentrator did not like what we had to offer.

[vanadium]

You should be able to connect to a cisco vpn graphically using network manager. For this, you (may) need to install network-manager-vpnc using Synaptic.

[b-boy]

You should be able to connect to a cisco vpn graphically using network manager. For this, you (may) need to install network-manager-vpnc using Synaptic.

I have tried this but is does not work

error
VPN connection failed

syslog

Jul  9 09:57:30 ubuntu154 kernel: [ 1130.073512] tun0: Disabled Privacy Extensions
Jul  9 09:57:31 ubuntu154 NetworkManager: <info>  VPN plugin failed: 1 
Jul  9 09:57:31 ubuntu154 NetworkManager: <info>  VPN plugin state changed: 6 
Jul  9 09:57:31 ubuntu154 NetworkManager: <info>  VPN plugin state change reason: 0 
Jul  9 09:57:31 ubuntu154 NetworkManager: <WARN>  connection_state_changed(): Could not process the request because no VPN connection was active.