Intuit Anywhere : Invalid Signature Error 401

问题

I am tying to fetch Accounts Before a certain date I use the following code

TimeZoneInfo pst = TimeZoneInfo.FindSystemTimeZoneById("Pacific Standard Time");
        DateTime now = TimeZoneInfo.ConvertTime(new DateTime(2012, 06, 30), pst);
        accountQuery.CreateTime = now;
        accountQuery.SpecifyOperatorOption(FilterProperty.CreateTime, 
               FilterOperatorType.BEFORE);
        accountQuery.PageNumber = 1;
        accountQuery.ResultsPerPage = 100;
        string a = Response.ToString();
        List<Intuit.Ipp.Data.Qbo.Account> accounts =
           accountQuery.ExecuteQuery<Intuit.Ipp.Data.Qbo.Account>(context)
              .ToList<Intuit.Ipp.Data.Qbo.Account>();

But I get an error Unauthorized OAuth Token: signature_invalid

来源：https://stackoverflow.com/questions/15294159/intuit-anywhere-invalid-signature-error-401