If you're using Perl 5.10.1 or later, you may also find Regexp::Debugger useful for understanding where your regex isn't behaving as you expect. In this case, the module took about 2 seconds to show me that:

\+(\d{4})
[download]

in your regex (which is supposed to match the timezone within the timestamp) is failing to match the leading space of:

<SPACE>+0200
[download]

in your actual string.

Damian