SMBX: MUSIC NOT WORKING IN SMBX

Well, my problem here is that I followed the instructions of putting custom music in levels.
Basically, I put the songs in my folder for my game, in this case my folder is "Mario Seasons", I copy the name into it, plus I also always have to put the ending in it, so in this case the file is "3-09. Area - Asteroid Coaster.MP3", and this has happened with other songs I've tried too, most of them being Asteroid Coaster. I click custom and...nothing.
The music won't play like it's suppose to. I don't know why! I copy the name of the song into the custom box for music, click custom, and nothing happens!
Could I get some help, I would be so grateful if someone told me what's going on, here's the song I'm trying to play:


Edit:Never mind... -_- as soon as I posted this, I went to go check the level, and test played it to see if it would work, out of curiosity, and guess what. It finally works, from now on, I should test play before I ask. Sorry. Someone delete this now, it never allows me to delete my own topics.