I Can't Update table with ormlite android

The problem is that I have a table product and my update script doesn't work aparently. It allwas return false.

Product.class

@DatabaseTable(tableName = "Product")
public class Product  {
@DatabaseField(index = true, generatedId = true)
private int productId;

@DatabaseField
private String name;

@DatabaseField
private int quantity;

//@DatabaseField(canBeNull = true)
//private Integer categorie;
//http://logic-explained.blogspot.com.ar/2011/12/using-ormlite-in-android-projects.html

@DatabaseField
private int categorie;

//@ForeignCollectionField
//private ForeignCollection<Categorie> itemsCategorie;  

@DatabaseField
private String description;

@DatabaseField
private String photo;

Product() {
}
public Product(int productId, String name, int quantity,            int categorie, String description, String photo) {
    super();
    this.productId = productId;
    this.name = name;
    this.quantity = quantity;
    this.categorie = categorie;
    this.description = description;
    this.photo = photo;
}



public void setDescription(String description) {
    this.description = description;
}
public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getAddress() {
    return description;
}

public void setAddress(String address) {
    this.description = address;
}
public int getProductId() {
    return productId;
}

public void setProductId(int productId) {
    this.productId = productId;
}

public int getQuantity() {
    return quantity;
}

public void setQuantity(int quantity) {
    this.quantity = quantity;
}

public int getCategorie() {
    return categorie;
}

public void setCategorie(int categorie) {
    this.categorie = categorie;
}

public String getPhoto() {
    return photo;
}

public void setPhoto(String photo) {
    this.photo = photo;
}
public CharSequence getDesc() {
    return null;
}


}

my script updateProduct

public boolean updateProduct(Product p) {
    boolean ret = false;
    if (productDao != null) {
        try {
            productDao = getDao(Product.class);

            UpdateBuilder<Product, Integer> updateBuilder = productDao
                    .updateBuilder();
            updateBuilder.updateColumnValue("name", p.getName());
            updateBuilder.updateColumnValue("quantity", p.getQuantity());
            updateBuilder.updateColumnValue("categorie", p.getCategorie());
            updateBuilder.updateColumnValue("description", p.getDesc());
            updateBuilder.updateColumnValue("photo", p.getPhoto());

            // but only update the rows where the description is some value
            updateBuilder.where().eq("productId", p.getProductId());
            // actually perform the update

            String str = updateBuilder.prepareStatementString();
            // UPDATE `Product` SET `name` = 'gcd' ,`quantity` = 1
            // ,`categorie` = 1 ,`description` = ? ,`photo` = '' WHERE
            // `productId` = 0

            if (productDao.update(updateBuilder.prepare()) != 1) {
                ret = false;
            } else {
                productDao.refresh(p);
                ret = true;
            }
        } catch (Exception e) {
            ret = false;
            e.printStackTrace();
        }
    }
    return ret;
}

then I call it with a function like this, but allways return false :(

public boolean updateProduct(Product p) {
    boolean ret = false; 
    try {
        ret = getHelper().updateProduct(p);




    } catch (Exception e) {
        e.printStackTrace();
        ret =false;
    }
    return ret;

}

I can create and delete but I can not update . I tried everything. If you please take a moment to answer my question I will appreciate.

The solution was Simply get the Instance of the object Product from the DB then modify to finaly send to the updateProduct method.

for example first I need to create any method first to get an objet by ID

   // get the Instance calling to the  getProductByID
   Product p = getHelper().getProductByID(p.getId())

   //modify any value of the product
   p.setFirstName("asd");

   //call the update
   ret = getHelper().updateProduct(p);

then my objects is Updated.