Can someone help me?

Hi! Can someone help me? I’m not a fluent English speaker/writer, so, sorry about any grammar mistakes. D:
So, the question is, I can’t remove the vocal from a song! Can anyone help me?
I don’t know how to remove the vocal without some tools (Like the Vocal-Remover tool from Audacity), but the tools aren’t working in this song!
So, can someone helps me to remove the vocal manually? Please! c:

There’s the song to download:
There’s the song on Youtube:

See you! c:

Vocal Remover will not work on that song because the song is mono (both the left and right channels are virtually identical).
This page on the Audacity wiki explains what the Vocal Removal effect does, and why it will not work on a mono track: