AGS wont play music beacuse it is an LFN (???)

[gamenewber]

so when I place my music file, which i have made both as a mp3 and a wav (and tested with both), in the game directory and i try and save the game in the editor to test if the audio will work in the actual game it says that i cant because it is an LFN
what is an LFN and what can i do to have it not be an LFN?
any help/feedback is greatly appreciated
thank you in advance.

[scotch]

LFN might be long filename... but that seems strange, are you making a dos game?
What is the file name of the music file?