if you have a shell, does it work the way you expect on this directory? does the pattern used with perl glob make a difference? and in the shell?

if glob is not enough, you might pipe-in the output of the ls (or equivalent) command (or even get it all in one go with qx{...})

 
open $globbing, "ls -1a |" or die;
while (<$globbing>) {
    chomp
    filter;
    ...
}
[download]

hth --stephan