From the SYNOPSIS:

On Unix boxes you shouldn't need to worry. On other system you may want to supply your own sub references.

...

$file = File::NCopy->new(u_chmod => \&my_chmod,f_check => \&my_fcheck)
+;
$file->copy "directory1","directory2";
[download]

Maybe the default f_check has problems with Windows absolute path names. If it's designed for Unix it probably thinks they're relative path names.

By the fact that you said "it doesn't work" I can see that you need to read How (Not) To Ask A Question. Please do.