Was it a stereo track or a mono track?

Vocal remover works (partially) by cancelling out the center signal *on a stereo wave file*. Part of the design from my understanding. So if the single track was mono it won't work well.

That said, reverb on vocals is often spread out and partially remains many times.. hit and miss depending on mix.

I do not work here, but the benefits are still awesome
Make your sound your own!