Disguise is correct, that could also very well be the case. We can't exactly tell from here what exactly should be done with your file, but you'll notice soon enough just by looking at the patterns while playing it in ModPlug Tracker or so.

And if you're not sure about a command in the file, either look in the ModPlug Tracker help-file (there's a list in there) or double-click on it. (or was it right-click? Gah, been using Impulse Tracker for too long now... ^-~)