Dynamic Controls - Add New Rating Of Selected Item Into Database

On my page I have a list of items with ajax rating controls next to them. These controls I create dynamically from Page_load where I give the rating controls the rating of each corresponding item from the database. The problem is now that when the rating-event is fired I want to go to my event handler och add the new rating of the selected item into my database, but between my click and the event handler-method is fired the Page_load method is run, where all ratings is set from the database again, which means that the new rating I clicked on was restored and that the new rating I was supposed to update my database with will be the old rating already in the database. I create my ratings like this:

SqlDataReader r = cmd.ExecuteReader(); //calling a stored procedure
RadRating rating = new RadRating();
rating.Rate += new System.EventHandler(rating_Click);
rating.ID = r["id"].ToString();
rating.AutoPostBack = true;
rating.Value = Convert.ToDecimal(r["Overall_rating"].ToString());

In my event handler:

protected void rating_Click(object sender, EventArgs e){
RadRating rt = (RadRating) sender;
double myRate = Double.Parse(rt.Value.ToString());
updating database with myRate
}

From what I heard I need to recreate the dynamic controls i Page_load in order for them to persist throug postbacks, but when I do this the old rating writes over the new rating that I clicked on and need to use for database insertion. How can I solve this?