Cap Monster Cloud: ERROR_KEY_DOES_NOT_EXIST

[manalsabbah]

I'm trying to use cap monster inside my program but each time I create a task it returns an error like this

{
    "errorId": 1,
    "errorCode": "ERROR_KEY_DOES_NOT_EXIST",
    "errorDescription": "Account authorization key not found in the system or has incorrect format",
    "taskId": 0
}

and this my code :

        private static readonly string Token = "61b33c5ec0b443efb83020a9023c3546";
        private static readonly CapMonsterClient client = new CapMonsterClient(Token);

        private  async Task RecaptchaAsync(string img)
        {
            string base64=GetBase64StringForImage(img);
            var captchaTask = new ImageToTextTask
            {
                Body= base64,
                CapMonsterModule= "yandexnew"
            };
            int taskId;
            try
            {
                taskId = await client.CreateTaskAsync(captchaTask);
            }
            catch (CapMonsterException er)
            {
                Program.loger("RecaptchaAsync Erorr" + er.ErrorCode + "\r\n" + er.ErrorDescription);
                return;
            }
            try
            {
                var solution = await client.GetTaskResultAsync<ImageToTextTaskResult>(taskId);
                var solinput = FindElement("//html//body//div[2]//div[9]//div//div//div[1]//div//div[2]//div//div[1]//div[4]//div//div//div//div//div[2]//div//div//div[2]//input", new FindElementBy(), true);
                solinput.SendKeys(solution.Text);
                var sendbtn = FindElement("//html//body//div[2]//div[9]//div//div//div[1]//div//div[2]//div//div[1]//div[4]//div//div//div//div//div[3]//button", FindElementBy.XPath, true);
                sendbtn.Click();
            }
            catch (CapMonsterException er)
            {
                Program.loger("RecaptchaAsync Erorr" + er.ErrorCode + "\r\n" + er.ErrorDescription);
                return;
            }

        }

can someone help me with this?