Entity Framework 4.2 "The type is not attributed with EdmEntityTypeAttribute but is contained in an assembly attributed with EdmSchemaAttribute

I am receiving the following error:

System.InvalidOperationException was unhandled Message=The type 'Judge' is not attributed with EdmEntityTypeAttribute but is contained in an assembly attributed with EdmSchemaAttribute. POCO entities that do not use EdmEntityTypeAttribute cannot be contained in the same assembly as non-POCO entities that use EdmEntityTypeAttribute.
Source=EntityFramework StackTrace: at System.Data.Entity.Internal.InternalContext.UpdateEntitySetMappingsForType(Type entityType) at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)....

 public class GenericRepository<TEntity> where TEntity : class
{
    internal z context;
    internal DbSet<TEntity> dbSet;

    public GenericRepository(z context)
    {
        this.context = context;
        this.dbSet = context.Set<TEntity>();
    }

    public GenericRepository()
    {
        this.context = new z();
        this.dbSet = context.Set<TEntity>();
    }

    public virtual IEnumerable<TEntity> Get(
        Expression<Func<TEntity, bool>> filter = null,
        Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> orderBy = null,
        string includeProperties = "")
    {

        IQueryable<TEntity> query = dbSet;

        if (filter != null)
        {
            query = query.Where(filter);
        }

        foreach (var includeProperty in includeProperties.Split
            (new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
        {
            query = query.Include(includeProperty);
        }

        if (orderBy != null)
        {
            return orderBy(query).ToList();
        }
        else
        {
            return query.ToList(); //Getting error here!!
        }
    }

    public virtual TEntity GetByID(object id)
    {
        return dbSet.Find(id);
    }

    public vi