Once received they will acknowledge with an e-mail. It is an automated response so my guess is some how they have not received it.
Dont know why but I dont know anyone who has not received one after applying!
Just my two pence worth though, you could always try calling the hr department or if you know anyone in easy ask them to recommend you. That would find out whether there is an application in the system for you as the recommendation would mean that they would screen your application immediately!
Best of luck
A319
