mapping class error

[amir sherafatian]

i have 13 error when i try to mapp DCDocumentAdmin class;(these errors are 2 type , but the part of lines that mentioned below as Marked(Bold) , in error , repeat freuqently for another objects(class in my project) . here , i wrote one of this object as example )

1.OpenAccess: The db-ref extension may only be used here when referencing an application identity class. (EandE.Organization.BSL.Entities.ORGFolder:ORGFolder_FORGChildFolders - EandE.Organization.BSL.Entities.ORGFolder) 

2.OpenAccess: Failed to process meta data on collection field 'FORGChildFolders' of class 'EandE.Organization.BSL.Entities.ORGFolder'.  

----------------------------

i try to mapp a class that contain a another class in my project as field that is Marked line(BOLD) in my code :

(this is my class that i want to map it) :

public class DCDocumentAdmin
{
    private int FId;
    [Telerik.OpenAccess.Depend()]
    private ORGPersonJob FORGPersonJob;
    private AdminType FAdminType;

    [Telerik.OpenAccess.FieldAlias("FId")]
    public int Id
    {
        get
        {
            return FId;
        }
        set
        {
            FId = value;
        }
    }
    [Telerik.OpenAccess.FieldAlias("FORGPersonJob")]
    public ORGPersonJob ORGPersonJob
    {
         get
         {
            return FORGPersonJob;
         }
         set
         {
            FORGPersonJob = value;
         }
    }
    [Telerik.OpenAccess.FieldAlias("FAdminType")]
    public AdminType AdminType
    {
         get
         {
            return FAdminType;
         }
         set
         {
            FAdminType = value;
         }
     }

}

and it is my ORGPersonJob Class :

[Telerik.OpenAccess.Persistent(IdentityField = "FId")]
    public class ORGPersonJob
    {
        [Telerik.OpenAccess.FetchField("InternalPersonnel")]
        private int FId;
        [Telerik.OpenAccess.FetchField("InternalPersonnel", Next = "InternalPersonnel")]
        private ORGPerson FORGPerson;
        [Telerik.OpenAccess.FetchField("InternalPersonnel", Next = "InternalPersonnel")]
        private ORGJob FORGJob;
        [Telerik.OpenAccess.Depend()]
        private IList<ORGUser> FORGUsers;

        [Telerik.OpenAccess.FieldAlias("FId")]
        public int Id
        {
            get
            {
                return FId;
            }
            set
            {
                FId = value;
            }
        }
        [Telerik.OpenAccess.FieldAlias("FORGPerson")]
        public ORGPerson ORGPerson
        {
            get
            {
                return FORGPerson;
            }
            set
            {
                FORGPerson = value;
            }
        }
        [Telerik.OpenAccess.FieldAlias("FORGJob")]
        public ORGJob ORGJob
        {
            get
            {
                return FORGJob;
            }
            set
            {
                FORGJob = value;
            }
        }
        public IList<ORGUser> ORGUsers
        {
            get
            {
                return FORGUsers;
            }
            set
            {
                FORGUsers = value;
            }
        }

    }

where is my mistake ?
and what is my solution?

tanks