>>I have SQL Express installed on my development laptop.
>>I want to simulate connecting to a remote SQL Server by using the IP address instead of localhost in the connection string. First question: Is this a good simulation of a remote connection?
>>When I try to use my IP instead of localhost in the connection string I can not connect. I did configure the SQL Server inctance to allow remote connections (using this article http://support.microsoft.com/kb/914277), but that didn't help.
>>I am sure it is something in my connection string. What could I be missing?
>>
>>If anyone has any information to share it would be great.
>
>Can you connect from SSMS using the TCP/IP address in the server name?

No (can't believe I didn't think of trying that), same exception.