I have this class:

public class AttachmentLocation
{
#region properties

public virtual Guid UserId { get; set; }

public virtual Guid LocationId { get; set; }

public virtual long IndexInLocation { get; set; }

#endregion

#region contained foreign objects

public virtual Attachment Attachment { get; set; }

#endregion


#region Methods need to override for CompositeId

public override bool Equals(object obj)
{
if (obj == null)
return false;
var t = obj as AttachmentLocation;
if (t == null)
return false;
if (UserId == t.UserId && LocationId == t.LocationId && Attachment.Id == t.Attachment.Id)
return true;
return false;
}

public override int GetHashCode()
{
return (UserId + "|" + LocationId + "|" + Attachment.Id).GetHashCode();
}

#endregion

}

I have this Fluent Mapping:

public class AttachmentLocaionMap : ClassMap<AttachmentLocation>
{
public AttachmentLocaionMap()
{
Table("Metadata_AttachmentLocation");
CompositeId()
.KeyReference(x => x.UserId, "UserId")
.KeyReference(x => x.Attachment.Id, "AttachmentId")
.KeyReference(x => x.LocationId, "LocationId");
Map(x => x.IndexInLocation).Not.Nullable();
Map(x => x.LocationId).Not.Nullable();

HasOne(x => x.Attachment);
}
}

which I register:

SessionFactory = Fluently.Configure(configuration).Mappings(m =>
{
m.FluentMappings.AddFromAssemblyOf<AttachmentLocaionMap>();
m.FluentMappings.AddFromAssemblyOf<FriendDetailsMap>();
}).BuildSessionFactory();

I get this runtime error:
> An association from the table Metadata_AttachmentLocation refers to an
> unmapped class: System.Guid
>
> Description: An unhandled exception occurred during the execution of
> the current web request. Please review the stack trace for more
> information about the error and where it originated in the code.
>
> Exception Details: NHibernate.MappingException: An association from
> the table Metadata_AttachmentLocation refers to an unmapped class:
> System.Guid
>
> Source Error:
>
>
> Line 19: Line 20: Line 21: SessionFactory =
> Fluently.Configure(configuration).Mappings(m => Line 22: {
> Line 23:
> m.FluentMappings.AddFromAssemblyOf<AttachmentLocaionMap>();
>
> Source File: C:\Users\elad\Documents\Visual Studio
> 2010\Projects\SVN\UGI\Ugi\Infrastructure\Dal\Adapters\NHibernateAdapter\NHibernateHelper.cs
> Line: 21
>
> Stack Trace:
>
>
> [MappingException: An association from the table
> Metadata_AttachmentLocation refers to an unmapped class: System.Guid]
> NHibernate.Cfg.Configuration.LogAndThrow(Exception exception) in
> d:\CSharp\NH\NH\nhibernate\src\NHibernate\Cfg\Configuration.cs:342
> NHibernate.Cfg.Configuration.SecondPassCompileForeignKeys(Table table,
> ISet done) in
> d:\CSharp\NH\NH\nhibernate\src\NHibernate\Cfg\Configuration.cs:1169
> NHibernate.Cfg.Configuration.SecondPassCompile() in
> d:\CSharp\NH\NH\nhibernate\src\NHibernate\Cfg\Configuration.cs:1120
> NHibernate.Cfg.Configuration.BuildSessionFactory() in
> d:\CSharp\NH\NH\nhibernate\src\NHibernate\Cfg\Configuration.cs:1249
> FluentNHibernate.Cfg.FluentConfiguration.BuildSessionFactory() in
> d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Cfg\FluentConfiguration.cs:227
>
> [FluentConfigurationException: An invalid or incomplete configuration
> was used while creating a SessionFactory. Check PotentialReasons
> collection, and InnerException for more detail.
>
> * Database was not configured through Database method. ]
> FluentNHibernate.Cfg.FluentConfiguration.BuildSessionFactory() in
> d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Cfg\FluentConfiguration.cs:232
> Ugi.Infrastructure.Dal.Adapters.NHibernateAdapter.NHibernateHelper.OpenSession()
> in C:\Users\elad\Documents\Visual Studio
> 2010\Projects\SVN\UGI\Ugi\Infrastructure\Dal\Adapters\NHibernateAdapter\NHibernateHelper.cs:21
> Ugi.Infrastructure.Dal.Adapters.NHibernateAdapter.NHibernateHelper.GetSession()
> in C:\Users\elad\Documents\Visual Studio
> 2010\Projects\SVN\UGI\Ugi\Infrastructure\Dal\Adapters\NHibernateAdapter\NHibernateHelper.cs:36
> Ugi.Infrastructure.Dal.Adapters.NHibernateAdapter.NHibernateDal`1..ctor()
> in C:\Users\elad\Documents\Visual Studio
> 2010\Projects\SVN\UGI\Ugi\Infrastructure\Dal\Adapters\NHibernateAdapter\NHibernateDal.cs:16
> Ugi.Infrastructure.Dal.Adapters.NHibernateAdapter.NHibernateDalFactory.GetDal()
> in C:\Users\elad\Documents\Visual Studio
> 2010\Projects\SVN\UGI\Ugi\Infrastructure\Dal\Adapters\NHibernateAdapter\NHibernateDalFactory.cs:17
> Ugi.Server.Sources.Logic.SourcesService..ctor() in
> C:\Users\elad\Documents\Visual Studio
> 2010\Projects\SVN\UGI\Ugi\Server\Sources\Logic\SourcesService.cs:36
> BuildUp_Ugi.Server.Sources.Logic.SourcesService(IBuilderContext ) +153
> Microsoft.Practices.ObjectBuilder2.DynamicMethodBuildPlan.BuildUp(IBuilderContext
> context) in
> c:\EntLib\UnityTemp\Compile\Unity\Unity\Src\ObjectBuilder\Strategies\BuildPlan\DynamicMethod\DynamicMethodBuildPlan.cs:37
> Microsoft.Practices.ObjectBuilder2.BuildPlanStrategy.PreBuildUp(IBuilderContext
> context) in
> c:\EntLib\UnityTemp\Compile\Unity\Unity\Src\ObjectBuilder\Strategies\BuildPlan\BuildPlanStrategy.cs:43
> Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext
> context) in
> c:\EntLib\UnityTemp\Compile\Unity\Unity\Src\ObjectBuilder\Strategies\StrategyChain.cs:110
> Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type t, Object
> existing, String name, IEnumerable`1 resolverOverrides) in
> c:\EntLib\UnityTemp\Compile\Unity\Unity\Src\UnityContainer.cs:512
>
> [ResolutionFailedException: Resolution of the dependency failed, type
> = "Ugi.Common.Model.Sources.ISourcesService", name = "(none)". Exception occurred while: Calling constructor
> Ugi.Server.Sources.Logic.SourcesService(). Exception is:
> FluentConfigurationException - An invalid or incomplete configuration
> was used while creating a SessionFactory. Check PotentialReasons
> collection, and InnerException for more detail.
>
> * Database was not configured through Database method.


How can I fix that?

TIA