Can't Connect .Net Application From Windows Server 2003 To Database Server (SQL Server 2000)

Hi,

I am having a problem connecting my .net applications from the application server to the database server. When I run the application from my windows xp (sp2) box it works fine. When I try to connect via SQL Management Studio to the database server from the application server I get the same error.

Here is the error:

System.Data.SqlClient.SqlException: An error has occurred while establishing a connection to the server.  When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)

 Here is the Environment:

App Server:

Windows Server 2003 Standard Edition

Inside Company's Firewall/ Network


Database Server:

Windows Server 2000 Advanced Edition

SQL Server 2000 SP4

Remote Connections to the Server is checked

Enable Protocols: Named Pipes & TCP/IP

TCP/IP Port: 1402 (I don't know why it isn't the default of 1433)

The db server is sitting out side the Company's firewall (don't ask me why). I can access it fine from inside the firewall on my XP box but not from windows server 2003. There is a web server outside the our network that also connects to the db server with no problem and that is running Windows Server 2003 Web Edition.

I can ping the db server from the app server using the IP address.

I tried using the IP address and the port 1402 in my connection string but that didn't work from any machine (XP and Server).

I imagine the issue is somehow related to the company's firewall but why would it only block Windows Server 2003 and not XP?

What do I tell the network admin to change?

Any help would be appreciated.

Thanks,

Oran