Either use the array reference:

my $array_ref = $adsobj_child->{member};
foreach (@{$array_ref})
{
  print "$_\n";
}
[download]

Or dereference it immediately:

my @array = @{$adsobj_child->{member}};
foreach (@array)
{
  print "$_\n";
}
[download]

See perlreftut, perllol and perldsc for more examples.