Asp.net mvc using EntityFramework: loading Person by passing id is retrieving a Object but Object properties are null?

i am hanging for while and i dont understand one thing...I will try to explain my issue...

I have model(Table) called FeuerwehrPerson and the class looks like that:

public partial class FeuerwehrPerson
{
    public FeuerwehrPerson()
    {
        this.BuchungenResultateList = new List<BuchungenResultate>();
        this.Notenspiegel=new Notenspiegel();
        this.Gemeinde=new Gemeinde();
    }

    public int FeuerwehrPersonId { get; set; }
    public string Anrede { get; set; }
    public string Vorname { get; set; }
    public string Nachname { get; set; }
    public System.DateTime Geburtstag { get; set; }
    public string Strasse { get; set; }
    public string Plz { get; set; }
    public string Ort { get; set; }
    public string Telefon { get; set; }
    public int GemeindeId { get; set; }
    public Nullable<int> NotenspielgelId { get; set; }
    public virtual ICollection<BuchungenResultate> BuchungenResultateList { get; set; }
    public virtual Gemeinde Gemeinde { get; set; }
    public virtual Notenspiegel Notenspiegel { get; set; }
}

In Feuerwehrperson are 2 Foreign Keys

1. GemeindeId
2. NotenspiegelId

and both of them are holding some values for a specific FeuerwehrPerson. Both Foreign Keys are not null in my FeuerehrPerson Table...

In my Controller i have a Edit Action...and i am searching for FeuerwehrPerson by id...thats working fine:

FeuerwehrPerson feuerwehrperson = db.FeuerwehrPerson.Find(id);   

When i am checking the values by using add Watch of feuerwehrperson Object there are some empty properties which shouldn´t be empty

The Object property Gemeinde should contain some values but its empty...also for Notenspiegel Object should contain SeminarA=true, SeminarB=true, SeminarC=true, rest is false but everything is false also NotenspiegelId and GemeindeId...but the Foreign Key references in Feuerwehrperson are not null...but why is it empty????

Please help me...