Downsampling AFS Files (XENA or anyone)

[linux box]

ok, i followed xena's guide on this, and got to where i use Afslnk.exe. I do exactly as the guide says, but when i run (for example):

Afslnk adxtxt.txt Newyk.afs

it leaves me with a 0 byte Nweyk.afs file. I have created the txt file as in the guide, too. I open it up, and it has all the files i need listed in it, but always leaves me with a 0 byte file. Pleae help me here...