My birthday popup message isn't working

First topic message reminder :

First of all, I don't get it. I don't get this popup stuff. Does popup mean sending to email? Secondly, I have enabled it the its management but everything isn't alright

hello and you please send me a test account with admin powers in a pm and the link to your forum and i will run a test for you. please note i will need the admin account for a max of 24hrs or more