i have a problem with cisco pix firewall 506E version 6.3
we have a cisco pix firewall version 6.3 at our center office and users in different locations make connection to this pix. This is a vpn over ipsec connection. They use cisco vpn client 5.0.02. After connecting to pix they log in to the windows Exchange 2003 server by MS OUTLOOK and access their e-mails.
one of the users work in a customer's office once a day. From this location he connects to pix with his laptop and get ip from pix but after that he can't connect to the server with MS OUTLOOK and also unable to ping any network resource. After about 15 minutes the connection is lost.
this laptop can connect from other locations there is no problem.
I am attaching the configuration of my PIX 506E and and Customers's PIX as well. So any change/Recomendation to my config or cutomer's PIX will highly be appriciated.