Custom music not looping

[Purple Phanto]

I tried to make my custom background music loop using Audacity with "LOOPSTART" and "LOOPEND" but it doesn't work.
I looked at files from existing episodes online and everyone did it the same way, so what did I do wrong?

I use OGG-files,
the files are pretty short
and my Audaicty version is 1.3 Beta (Unicode)

Any ideas?

[mariobrigade2018]

There's another tool that can do it. It's from here:
viewtopic.php?t=29670