I am developing a project using Visual Studio 2008 in C#, I have added the class library within the project and set up the relevant references and used the relevant using statements. It seems to be a problem with just this one folder. can anyone help?

this is the error message:

Error 28 The type or namespace name 'Domain' does not exist in the namespace 'Forestry.SchoolLibrary' (are you missing an assembly reference?) C:\Projects\SchoolofForestry\trunk\Source\School\Account\Presenter\EditAccountPresenter.cs 26 40 School

these are my using statements:

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Data.Linq;
using System.Text;
using System.Xml;
using Forestry.SchoolLibrary.Core.Domain;
using Forestry.SchoolLibrary.Properties;