Fik løst det vha. dette link:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnsse/html/sseoverview.asp"Networking Support
Only the shared memory connection type on the local machine is accessible by default for SQL Server Express, although the user can explicitly turn on other supported protocols such as TCP/IP and Named Pipes. VIA and HTTP protocols are not supported in SQL Server Express. With only shared memory available by default, connections from a remote machine to SQL Server Express will fail unless the networking is turned on. To turn networking on, there are the following options:
Use the Surface Area Configuration tool to enable networking and enable and start the SQLBROWSER service.
Use SQL Server Configuration Manager to enable relevant protocols and start SQL Browser. Figure 2 shows the usage of this tool to enable the networking protocols.
Use DISABLENETWORKPROTOCOLS=0 in the setup command line, if you know in advance that networking support is needed.
Use SMO-based scripting to enable the protocols."
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