[FIXED BY MYSELF] No sound in Lmms

Having trouble with LMMS? Ask about it here.
Yesterday I was making a new song and everything worked perfectly. But today when I opened Lmms there was no sound in Lmms.

I've tried everything but it still doesn't work. I have already changed the audio interface to SDL with my driver as device but it doesn't make any difference. There is no problem with my speakers because when I listen to songs on Youtube there is no problem.

Can someone help me with this problem?
(sorry, my English isn't very good)

Iv'e fixed by myself. I moved some downloaded files to downloads instead of placing them in a seperate folder.
So, the problem is solved?

You're welcome!