Single instance with multiple IP's - Cannot connect to DB

Hi!

I'm running SQL Server 2005 on a Windows Server 2008R2 server.

The Windows server has two IP's on the same NIC (one is used for network alias). So basicly the server has two network names with different IP's. Lets call them name1 and name2.

When I try to connect to the DB with name1 (using connection string name1\instance-name) all is well. If I try to connect to the DB with the secodary IP using name2\instance-name I get a connection error. If I use the connection string name2,62182 (which is the dynamic port) it works.

How can I configure the instance so that I can connect with servername\instance-name with both names?

edit:
In Windows XP it is possible to connect using both names. In Windows 7 it is only possible to use the first name.

Thanks in advance.