SQL error 26=-error locatig server. ASP.NET

I am trying to deploy my .NET webservice on to provider (somee.com). I published the webservice and copied the folder over to the hosting site. I have my App_data folder copied too. I can access the service webpage. But when trying to access the website I received the following err开发者_C百科or. I have sqlserver express on my local machine.

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

should i make i changes to my web.config file.

Please help

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You have to modify your ASP app to use the database provided by somee for you (see http://somee.com/MSSqlDefault.aspx), not the one in app_data. You also need to upload your deployment scripts and configure the somee provided database before you can start running your ASP app.