is the local IP range at the new office the same IP range as the local IP range where the Exchange server is?

 I have a VPN set up on my laptop so that when I am at home connected
 through wireless to my broadband, I still access the server and send
 and recieve through outlook. We also use Microsoft CRM which
 intergrates with outlook. All this works fine at home, but I am working
 out of a new office now and I'm having problems. There is an open
 wireless network, I can connect fine and browse the web etc. I can dial
 the VPN connection and connect fine, I am also connevt and use
 Microsoft CRM perfectly, however for some reason I cannot send and
 receive outlook.

 I've tried everything but cannot work out why I am unable to connect.
 Can anyone suggest what might be the problem, as its driving me mad.
 Thanks