DFS wrong active target

Hey,

I'm having problems with a DFS Namespace that does not connect to a correct DFS Target.  The following setup I have:

• Two Sites Bruxelles and Houston (correct IP Ranges have been assigned)
• Houston Site is connected with Checkpoint VPN Gateway to Bruxelles Site
• Bruxelles have a domain controller and Houston does not have a domain controller locally
• DFS Namespace \\domain.com \ deployment
• One DFS Target in Houston (\\server02 \ deployment) and have Primary DNS setting to the DNS server in Bruxelles 
• One DFS Target in Bruxelles (\\server01 \ deployment)

When an Houston User try to access the DFS Namespace it always connect to the DFS target in Bruxelles. Anyone knowns what this problem could be? Even when I configure the DFS Target folder to  “Exclude targets outside of the client's site.” . If I check the properties of a folder in DFS Namespace and go to the tab DFS I only see the Bruxelles target folder and not the Houston target folder.

Is this because there is no domain controller in Houston and no DNS server available?