Hi!
You should try to use <code> tags instead of whatever you used, because your post is scrambling the formatting of the whole page.

Try putting

$request->header( 'Cache-Control' => 'no-store' );
$request->header( Pragma => 'no-cache' );
[download]

before

my $response = $browser->request #...
[download]

and that should avoid your proxy from keeping the cache.