Vista and windows VPN

I have a vista machine that connects to a SBS server 2003. The vpn connects and I can ping all over the place. When I try to connect to a share, it tells me it doesnt exist or user rights. I am using an account with domain admin rights and the share has domain admins under security and permissions. I have adjusted the properties on the vista vpn connection not to use remote gateway and statically assigned the dns and wins ip. Thanks in advance