SqlDataAdapter && SqlParameter

Hi I am writing an app in flash which needs to hook up to MS SQL via asp.
I need the code below to pass the var (ptodaysDate) to the sql statement. I can hard code it in and it works great but I really need to pass the var from flash.
Pulling my hair out here, not much left to go.
Any help greatly appreciated.
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   [WebMethod]
    public Schedule[] getSchedule(int ptodaysDate)
    {
        
        SqlDataAdapter adpt =
            new SqlDataAdapter("SELECT scheduleID, roomName, eventType,unitName,groupName,staffName,staffName2,theDate,theEnd FROM tb_schedule Where theDate >= @rtodaysDate", connString);
        SqlParameter rtodaysDate = new SqlParameter("@rtodaysDate", ptodaysDate);
      

        DataSet ds = new DataSet();
        ArrayList al = new ArrayList();
        adpt.Fill(ds);
        foreach (DataRow row in ds.Tables[0].Rows)
        {
            Schedule obj = new Schedule();
            obj.scheduleID = (int)row["scheduleID"];
            obj.roomName = (string)row["roomName"];
            obj.eventType = (string)row["eventType"];
            obj.unitName = (string)row["unitName"];
            obj.groupName = (string)row["groupName"];
            obj.staffName = (string)row["staffName"];
            obj.staffName2 = (string)row["staffName2"];
            obj.theDate = (string)row["theDate"];
            obj.theEnd = (string)row["theEnd"];
            al.Add(obj);
        }
        Schedule[] outArray = (Schedule[])al.ToArray(typeof(Schedule));
        return outArray;
    }

    public class Schedule
    {
        public int scheduleID;
        public string roomName;
        public string eventType;
        public string unitName;
        public string groupName;
        public string staffName;
        public string staffName2;
        public string theDate;
        public string theEnd;
       
    }