KLQ

Hi guys, Can anyone take a quick listen at this clip and tell me if this really "floaty" or whiny voice is a lack of chest voice strength and/or straying into falsetto, or something else? The song calls for a really light voice but I'm having trouble making a light/flute-y voice without making it sound too "whiny" (like the high-pitched part of yodeling almost). I just need a pointer in the right direction then I can work on improving it. As of now when I listen to it I don't really know what is the root of the problem. https://app.box.com/s/47hummk6r8qj34rh89rzo210tzhgl26q (Sorry the song is not in English as it's the only file I have on hand atm) Thanks.