Not Getting Expiry Date is Invalid Error message

Not Getting any message from receipt.GetMessage() when expiryDate is passed as "10100", Day_key also returns Null. Below is the code for referance.

ResAddCC resaddcc = new ResAddCC();
resaddcc.SetPan(newMoneris.pan);
resaddcc.SetExpDate(newMoneris.expdate);
resaddcc.SetCryptType(crypt_type);
resaddcc.SetGetCardType("true");

HttpsPostRequest mpgReq = new HttpsPostRequest();
//mpgReq.SetHost(host);
mpgReq.SetProcCountryCode(processing_country_code);
if (testMode == "1")
{
mpgReq.SetTestMode(true);
}
mpgReq.SetStoreId(store_id);
mpgReq.SetApiToken(api_token);
mpgReq.SetTransaction(resaddcc);
mpgReq.SetStatusCheck(status_check);
mpgReq.Send();

Receipt receipt = mpgReq.GetReceipt();