SOAP Web servis problem

Code:

    [WebMethod]
    public int InsertCustomer(string FirstName, string LastName, string Address, string City, string StateProvince, string PostalCode, string Country)
    {
        CustomersTableAdapter CustomerTA = new CustomersTableAdapter();
        if (FirstName.Length!=0)
        {
            int new_customerID = Convert.ToInt32(CustomerTA.InsertQuery(
                        FirstName,
                        LastName,
                        Address,
                        City,
                        StateProvince,
                        PostalCode,
                        Country
                        ));
            return new_customerID;

        }
        else
        {
            Exception ex = new Exception("FirstName can`t be null");
            return ex.Message;
        }
    }

Code:
class ExampleClass
{
    // A dynamic field.
    static dynamic field;

    // A dynamic property.
    dynamic prop { get; set; }

    // A dynamic return type and a dynamic paramater type.
    public dynamic exampleMethod(dynamic d)
    {
        // A dynamic local variable.
        dynamic local = "Local variable";
        int two = 2;

        if (d is int)
        {
            return local;
        }
        else
        {
            return two;
        }
    }
}