Error saving list of related objects

   I get the following error when trying to save (using devforce 6.0.5)
Entity Save Error: System.Data.UpdateException: An error occurred while updating 
the entries. See the inner exception for details. ---> 
System.Data.SqlClient.SqlException: The DELETE statement conflicted with the 
REFERENCE constraint "FK_CompanyLocation_Company". The conflict occurred in 
database "jts2", table "dbo.CompanyLocation", column 'CompanyID'. The statement 
has been terminated. at System.Data.SqlClient.SqlConnection.OnError(SqlException 
exception, Boolean breakConnection) at 
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, 
Boolean breakConnection) at 
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning() at 
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand 
cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, 
TdsParserStateObject stateObj) at 
System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, 
RunBehavior runBehavior, String resetOptionsString) at 
System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior 
cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) at 
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, 
RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult 
result) at 
System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, 
String methodName, Boolean sendToPipe) at 
System.Data.SqlClient.SqlCommand.ExecuteNonQuery() at 
System.Data.Mapping.Update.Internal.DynamicUpdateCommand.Execute(UpdateTranslator 
translator, EntityConnection connection, Dictionary`2 identifierValues, List`1 
generatedValues) at 
System.Data.Mapping.Update.Internal.UpdateTranslator.Update(IEntityStateManager 
stateManager, IEntityAdapter adapter) --- End of inner exception stack trace --- 
at 
System.Data.Mapping.Update.Internal.UpdateTranslator.Update(IEntityStateManager 
stateManager, IEntityAdapter adapter) at 
System.Data.EntityClient.EntityAdapter.Update(IEntityStateManager entityCache) 
at System.Data.Objects.ObjectContext.SaveChanges(SaveOptions options) at 
IdeaBlade.EntityModel.Edm.EdmSaveExecutor.ProcessSaves(IEnumerable`1 
groupsByType) at IdeaBlade.EntityModel.Edm.EdmSaveExecutor.SaveWithinContext() 
at IdeaBlade.EntityModel.Edm.EdmSaveExecutor.Save(DataSourceResolver 
dataSourceResolver, IDataSourceKey dsKey, SaveWorkState workState)

What I'm doing is trying to delete a company using an entitygraph

 public List<EntitySpan> GetSpan()
        {
             List<EntitySpan> spans = new List<EntitySpan>();

            EntitySpan aSpan = new EntitySpan(typeof(Company), EntityRelations.FK_CompanyLocation_Company);
            spans.Add(aSpan);
            aSpan = new EntitySpan(typeof(Company), EntityRelations.FK_CompanyContact_Company);
            spans.Add(aSpan);
            return spans;
        }

        public void GetEntityGraphAsync(Action<IList<Object>> callback)
        {    
           //First ensure all children are loaded
            IEntityQuery<Company> query =((JTS2Entities) this.EntityAspect.EntityManager).Companies.Where(c => c.CompanyID == this.CompanyID)
            .Include(EntityPropertyNames.CompanyContacts)
            .Include(EntityPropertyNames.CompanyLocations);

            ((JTS2Entities)this.EntityAspect.EntityManager).ExecuteQueryAsync<Company>(query
                , (o) => {
                    // Create roots list and add the employee.
                    List<Entity> roots = new List<Entity>();

                    roots.Add(this);

                    // Add span(s).

                    List<EntitySpan> spans = GetSpan();

                    // Get entity graph for entities in roots

                    EntityState entityState = EntityState.AllButDetached;

                    IList<Object> entityGraph = this.EntityAspect.EntityManager.FindEntityGraph(roots, spans, entityState);
                    callback(entityGraph);
                }
                , null);
        }

after getting the entityGraph i iterate over it and delete them

	           foreach (var item in entityGraph)
                   {
                       ((Entity)item).EntityAspect.Delete();
                   }

then I call save

		 _mgr.SaveChangesAsync(entityGraph, null, SaveCallBack, null);

What I think is happening is that it is deleting them in the wrong order.  It's trying to delete the company first before the location.  Possibly by deleting the location I have confused the framework that there are no relations?

Also, this only happens if I just created the company and location.  If the company (and its locations and contacts) was just loaded from the database the delete seems to work.