Visual Basic.NET - Ayuda Urgente

Hola amigos tengo un porblema con un programa de Visual.NET este es la descripcion del error alguien me podria decir tan solo que es.....
Gracias
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************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.ExceptionHandlingConfigurationView.GetExceptionPolicyData(String policyName)
at Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.ExceptionPolicyCustomFactory.GetConfiguration(String id, IConfigurationSource configurationSource)
at Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.ExceptionPolicyCustomFactory.CreateObject(IBuilderContext context, String name, IConfigurationSource configurationSource, ConfigurationReflectionCache reflectionCache)
at Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ObjectBuilder.ConfiguredObjectStrategy.BuildUp(IBuilderContext context, Type t, Object existing, String id)
at Microsoft.Practices.ObjectBuilder.BuilderStrategy.BuildUp(IBuilderContext context, Type typeToBuild, Object existing, String idToBuild) in C:\Program Files\Microsoft Composite UI App Block\CSharp\Source\ObjectBuilder\BuilderStrategy.cs:line 39
at Microsoft.Practices.ObjectBuilder.SingletonStrategy.BuildUp(IBuilderContext context, Type typeToBuild, Object existing, String idToBuild) in C:\Program Files\Microsoft Composite UI App Block\CSharp\Source\ObjectBuilder\Strategies\Singleton\SingletonStrategy.cs:line 48
at Microsoft.Practices.ObjectBuilder.BuilderStrategy.BuildUp(IBuilderContext context, Type typeToBuild, Object existing, String idToBuild) in C:\Program Files\Microsoft Composite UI App Block\CSharp\Source\ObjectBuilder\BuilderStrategy.cs:line 39
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) in C:\Program Files\Microsoft Composite UI App Block\CSharp\Source\ObjectBuilder\BuilderBase.cs:line 101
at Microsoft.Practices.ObjectBuilder.BuilderBase`1.BuildUp(IReadWriteLocator locator, Type typeToBuild, String idToBuild, Object existing, PolicyList[] transientPolicies) in C:\Program Files\Microsoft Composite UI App Block\CSharp\Source\ObjectBuilder\BuilderBase.cs:line 79
at Microsoft.Practices.ObjectBuilder.BuilderBase`1.BuildUp[TTypeToBuild](IReadWriteLocator locator, String idToBuild, Object existing, PolicyList[] transientPolicies) in C:\Program Files\Microsoft Composite UI App Block\CSharp\Source\ObjectBuilder\BuilderBase.cs:line 66
at Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ObjectBuilder.EnterpriseLibraryFactory.BuildUp[T](IReadWriteLocator locator, String id, IConfigurationSource configurationSource)
at Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ObjectBuilder.LocatorNameTypeFactoryBase`1.Create(String name)
at Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.ExceptionPolicy.GetExceptionPolicy(Exception exception, String policyName)

Si lees al inicio dice NULLReference .. indica que estas intentando hacer referencia a un objeto vacio, nulo o que no ha sido referenciado apropiadamente.

object Objt = new object();

o verifica que el resultado de un metodo no devuelva nulo.

obj = ObtenerDS();

Verifica que no sea nulo.

Saludos.