jpa composite key with embedded field reflection fail

I want to have a primary key with an embedded field, i have managed to have hibernate create the tables, but it is having a problem with saving, when i save (using spring repository), i get the following exceptions:

"org.hibernate.PropertyAccessException: could not get a field value by reflection getter of StockHistory.dateTime"

and down the stack trace there is the exception

"java.lang.IllegalArgumentException: Can not set utils.time.Time field StockHistory.dateTime to utils.time.Time"

this is the primary ID class

public class StockHistoryId3 implements Serializable
{
    private static final long   serialVersionUID    = 1L;

    private int stockId;
    private Time dateTime;

    public StockHistoryId3(){}

    public StockHistoryId3(Time time, int stockId)
    {
        this.setDateTime(time);
        this.setStockId(stockId);
    }   

    @Override
    public boolean equals(Object target) 
    {
        boolean result = false;

        if(target != null && target instanceof StockHistoryId3)
        {
            StockHistoryId3 other = (StockHistoryId3) target;

            if(Integer.compare(this.getStockId(), other.getStockId()) == 0 
            && this.getDateTime().equals(other.getDateTime()))
            {
                result = true;
            }
        }

        return result;
    }

    @Override
    public int hashCode()
    {
        int result = 89;

        result += this.getStockId() + this.getDateTime().getDateTime();

        return result;
    }

    // setters & getters
    public int getStockId()
    {
        return stockId;
    }

    private void setStockId(int stockId)
    {
        this.stockId = stockId;
    }

    public Time getDateTime()
    {
        return dateTime;
    }

    public void setDateTime(Time dateTime)
    {
        this.dateTime = dateTime;
    }
}

and this is the class to be mapped (not all of it for brevity)

@Entity
@Table(name = Configuration.DB_TABLE_NAME_STOCK_HISTORY)
@IdClass(StockHistoryId3.class)
public class StockHistory
{
    @Id
    @Column(name = "stockId", insertable = false, updatable = false)
    @JoinColumn(name = "stockId", nullable = false)
    private int stockId;

    @Id
    @Embedded
    @AttributeOverrides
    ({
        @AttributeOverride(name="timestamp", column=@Column(name="time")),
    })
    private Time dateTime;
}

and this is the Time class (not all of it for brevity)

@Embeddable
@Component(value = "Time")
@Scope(value = "prototype")
public class Time implements Serializable
{
    private static final long   serialVersionUID    = 1L;


    @Column(name = "timestamp")
    private long dateTime;

    @Transient
    private LocalDateTime date;


    public Time(){}

    public Time(long timestamp)
    {
        this.setDateTime(timestamp);
        this.setDate(new LocalDateTime(timestamp));
    }

    @Override
    public boolean equals(Object target) 
    {
        boolean result = false;

        if(target != null && target instanceof Time)
        {
            Time other = (Time) target;

            if(this.getDateTime() == other.getDateTime())
            {
                result = true;
            }
        }

        return result;
    };
}

any help about my problem thanks