I am trying to file a missing mileage claim for the EVA Air flight I took last month. How do I insert the departure date, I tried all the following:

20150704
07042015
04072015
2015-7-4
4-7-2015
7-4-2015
4 Jul 2015

None of these worked and it keeps saying that the flight is ineligible since I was not an Aeroplan member on that date!

Does anyone know how can I apply for mileage credits on my flight? Thanks.