How can I deserialize this JSON (Unexpected character encountered while parsing value)?

I have no experience with deserialization, and am trying to figure out how to get this working. I am using JSON.NET, and attempts to deserialize come up with the following: Unexpected character encountered while parsing value: c. path '', line 0 position 0

I am currently working with the following JSON object:

{

            "id":"1024",

            "OrderNumber":"1024",

            "OrderDate":"11/17/2014 2:20:35 PM",

            "ShippingMethod":"USPS Priority Mail",

            "BillingAddress":{

                        "FirstName":"Joe",

                        "LastName":"Test1",

                        "Company":"",

                        "AddressLine1":"9 Hispalis Rd",

                        "AddressLine2":"",

                        "City":"Andover",

                        "State":"MA",

                        "Postcode":"01810",

                        "Country":"US",

                        "Email":"Joe@Test.com",

                        "Phone":"9785553902"

            },

            "ShippingAddress":{

                        "FirstName":"Joe",

                        "LastName":"Test",

                        "Company":"",

                        "AddressLine1":"9 Hispalis Rd",

                        "AddressLine2":"",

                        "City":"Andover",

                        "State":"MA",

                        "Postcode":"01810",

                        "Country":"US",

                        "Email":"Joe@Test.com",

                        "Phone":"9785553902"

            },

            "UpdateAt":"11/17/2014 2:21:08 PM",

            "OrderStatus":"New",

            "TotalAmount":22.70,

            "PaidAmount":0.0,

            "ShippingAmount":6.95,

            "TaxAmount":0.00,

            "OrderItems":[{

                        "ProductSKU":"PF7977",

                        "Quantity":"1.00",

                        "Price":"15.75",

                        "Discount":"0.00"

            }],

            "HandlingInstructions":null,

            "SpecialInstructions":null,

            "PromotionCode":null,

            "SalesChannelId":"a57c68d2-c544-4f7a-8ed0-a39a00e2c1e0",

            "Shipments":[{

"id":"1018",

"Carrier":

"USPS",

"ShippingService":"Priority",

"Status":"Completed",

"Box1":"1010",

"TrackingNumber1":"9405510200882424054304",

"ShippedDate1":"12/11/2014 12:56:40 AM",

"Weight1":"3.00",

"WeightUnit1":"lbs"}],

"DropShipPurchaseOrders":[{

"id":"1000",

"SupplierName":"Baldwin Filters",

"ShippingService":"USPS Parcel Post",

"ShipTo":"Paul Quirnbach",

"ShipmentId":"1019",

"SKU1":"PF7977",

"Quantity1":"1.00",

"SKU2":"BT7349",

"Quantity2":"3.00"}]
}

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Here is the PO Class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Newtonsoft.Json;

namespace FreestyleAPI
{
    public class PO
    {
    [JsonProperty("id")]
    public int id { get; set; }

    [JsonProperty("OrderNumber")]
    public int OrderNumber { get; set; }

    [JsonProperty("OrderDate")]
    public DateTime OrderDate { get; set; }

    [JsonProperty("ShippingMethod")]
    public string ShippingMethod { get; set; }

    [JsonProperty("BillingAddress")]
    public BillingAddress BillingAddress { get; set; } //requires class

    [JsonProperty("ShippingAddress")]
    public ShippingAddress ShippingAddress { get; set; } //requires class

    [JsonProperty("UpdateAt")]
    public DateTime UpdateAt { get; set; }

    [JsonProperty("OrderStatus")]
    public string OrderStatus { get; set; }

    [JsonProperty("TotalAmount")]
    public decimal TotalAmount { get; set; }

    [JsonProperty("PaidAmount")]
    public decimal PaidAmount { get; set; }

    [JsonProperty("ShippingAmount")]
    public decimal ShippingAmount { get; set; }

    [JsonProperty("TaxAmount")]
    public decimal TaxAmount { get; set; }

    [JsonProperty("OrderItems")]
    public OrderItems[] OrderItems { get; set; } //requires class

    [JsonProperty("HandlingInstructions")]
    public string HandlingInstructions { get; set; }

    [JsonProperty("SpecialInstructions")]
    public string SpecialInstructions { get; set; }

    [JsonProperty("PromotionCode")]
    public string PromotionCode { get; set; }

    [JsonProperty("SalesChannelId")]
    public string SalesChannelId { get; set; }

    [JsonProperty("Shipments")]
    public Shipments[] Shipments { get; set; } //requires class

    [JsonProperty("DropShipPurchaseOrders")]
    public DropshipPurchaseOrders[] DropShipPurchaseOrders { get; set; } //requires class

}
}

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Here is the deserialization code:

logger.Log("loadJSON:" + strfile);

            FileReference fileref = new FileReference();
            fileref.filename = strfile;

            PO POTest = new PO(); //instance of PO class

            fileref.isValid = false;
            //load the xml document
            #region
            try
            {
                POTest = JsonConvert.DeserializeObject<PO>(strfile);

                Console.WriteLine("success,loaded JSON");
                logger.Log("loaded JSON:" + strfile);

            }
            catch (Exception ex)
            {
                logger.Log("unable to load JSON doc:" + strfile + " " + ex.ToString());
}

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