You're welcome. But be aware, XML::Simple plays not nice sometimes. Change your xml file to the following and show what happens:

<?xml version="1.0" encoding="utf-8"?>
<ApiResponse Status="OK" xmlns="http://api.namecheap.com/xml.response"
+>
  <Errors />
  <Warnings />
  <RequestedCommand>namecheap.domains.getList</RequestedCommand>
  <CommandResponse Type="namecheap.domains.getList">
    <DomainGetListResult>
      <Domain ID="8888999" Name="Domain4.com" Expires="05/20/2015"/>
    </DomainGetListResult>
    <Paging>
      <TotalItems>4</TotalItems>
      <CurrentPage>1</CurrentPage>
      <PageSize>50</PageSize>
    </Paging>
  </CommandResponse>
  <Server>API02</Server>
  <GMTTimeDifference>--5:00</GMTTimeDifference>
  <ExecutionTime>0.008</ExecutionTime>
</ApiResponse>
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You'll see your script dies.

XML::Simple creates an array ref when it sees more than one element, but a simple hash ref when there is one.

Instantiate you XML::Simple object this way to force that the one element is always handles as an array:

my $result = $xml->XMLin("myouput.xml", ForceArray => ['Domain']);
[download]

When you start learning XML handling modules have a look at XML::Twig.

McA