Enterprise Library 2006 - App.config

Hi, I'm trying to use the DatabaseFactory.CreateDatabase() method, but I keep getting an exception:

VB Code:

at Microsoft.Practices.EnterpriseLibrary.Data.DatabaseConfigurationView.get_DefaultName()
   at Microsoft.Practices.EnterpriseLibrary.Data.DatabaseMapper.MapName(String name, IConfigurationSource configSource)
   at Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ObjectBuilder.ConfigurationNameMappingStrategy.BuildUp(IBuilderContext context, Type t, Object existing, String id)
   at Microsoft.Practices.ObjectBuilder.BuilderBase`1.DoBuildUp(IReadWriteLocator locator, Type typeToBuild, String idToBuild, Object existing, PolicyList[] transientPolicies)
   at Microsoft.Practices.ObjectBuilder.BuilderBase`1.BuildUp(IReadWriteLocator locator, Type typeToBuild, String idToBuild, Object existing, PolicyList[] transientPolicies)
   at Microsoft.Practices.ObjectBuilder.BuilderBase`1.BuildUp[TTypeToBuild](IReadWriteLocator locator, String idToBuild, Object existing, PolicyList[] transientPolicies)
   at Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ObjectBuilder.EnterpriseLibraryFactory.BuildUp[T](IReadWriteLocator locator, IConfigurationSource configurationSource)
   at Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ObjectBuilder.EnterpriseLibraryFactory.BuildUp[T](IConfigurationSource configurationSource)
   at Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ObjectBuilder.NameTypeFactoryBase`1.CreateDefault()
   at Microsoft.Practices.EnterpriseLibrary.Data.DatabaseFactory.CreateDatabase()
   at DAL.Controller.Country_Add(String name, String code) in ...\Controller.cs:line 83

This is my app.config, and I'm pretty sure it is correct:

Code:

---

<?xml version="1.0" encoding="utf-8"?>
<configuration>
        <configSections>
                <section
                        name="dataConfiguration"
                        type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null"/>
        </configSections>
        <dataConfiguration
                defaultDatabase="mydb" />
        <connectionStrings>
                <add
                        name="mydb"
                        connectionString="Data Source=(local);Initial Catalog=mydb;Integrated Security=True;"
                        providerName="System.Data.SqlClient" />
        </connectionStrings>
</configuration>

---

Any ideas on what the problem might be?

I've been having the same problem, did you ever resolve this.

It's odd in my case because it works fine within the development environment but when I deploy it (even on the same machine) I get the object not set to an instance error.