If you are using LWP::UserAgent as it appears then you might just as well do something like:

# .. your modules

use XML::Simple;
use Data::Dumper;

# make request and get response;
# ...

my $data = XMLin($response->as_string);

# the following just to show you the structure.

print Dumper($data);
[download]

You should read the XML::Simple documentation for more on how to control the parsed data structure.

/J\