I want to track which users are running Kazaa to try and track down a bandwidth issue on my network. Why doesn't this code work?

foreach (@machine) {
    if (-e "//$_/c$/Program Files/KaZaA Lite/kazaa.exe") {
    print "KAZAA LITE IS INSTALLED ON $_.\n";
    } else {
    print "Kazaa lite was not detected on $_.\n";
    }
     
    if (-e  "//$_/c$/Program Files/Kazaa/kazaa.exe") {
    print "KAZAA IS INSTALLED ON $_.\n";
    } else {
    print "Kazaa was not detected on $_.\n";
    }

}
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