[Blind-sysadmins] Vista 64 bit vpn to 2003

Hi everyone, One of my staff bought her own laptop and came in with it for me to setup on our network. Wel because she went and got Vista home premium, I informed her that she can use RDP but can't connect to our domain. I then also noticed that I couldn't get a VPN connection to our 2003 server. She's got the 64 bit version of Vista. Is this likely to be the reason a VPN connection is failing on our 2003 server? Thanks.