rss reader in perl

Not sure if this board is helpful with this kind of stuff, but I'm trying to teach myself perl by writing simple scripts. This is an rss reader that prints with text I want to the command prompt. It will sometimes print items that don't contain the text, it also displays items with the text at least twice.
Anything obvious?

#!/usr/bin/perl

$feed_link="http://boards.4chan.org/n/index.rss";
$feed_file="/scripts/rss/feed.txt";
@linkarray = (" ");
while(1) {
system("wget -q $feed_link -O /scripts/rss/feed.txt");

open(RSSFILE, "<", $feed_file);

while(<RSSFILE>)
{
    if(/<item>/../<\/item>/)
    {
      if(/<title>/../<\/title>/)
      {
        $whitespace = index $_, "<";
        $title_string = substr $_, $whitespace;
        $title_string =~ s/<title>//g;
        $title_string =~ s/<\/title>//g;
        chomp($title_string);
      }
      elsif(/<link>/../<\/link>/)
      {
        $whitespace = index $_, "<";
        $link_string = substr $_, $whitespace;
        $link_string =~ s/<link>//g;
        $link_string =~ s/<\/link>//g;
        chomp($link_string);
      }
      elsif(/<description>/../<\/description>/)
      {
        $whitespace = index $_, "<";
        $description_string = substr $_, $whitespace;
        $description_string =~ s/<description>//g;
        $description_string =~ s/<\/description>//g;
        chomp($description_string);
      } 
    }
  if($link_string ~~ @linkarray) { }
  else
  {

    if(($title_string =~ m/(deen|studio|a)/i) or ($description_string =~ m/(deen|studio|a)/i))
    {
      print "\n********************\n$title_string\n$link_string\n********************\n";
      push(@linkarray, $link_string);
    }
  }
}
sleep(60);
}

>>2
Says
Can't locate XML/Twig.pm in @INC (@INC contains: C:/strawberry/perl/lib C:/straw
berry/perl/site/lib C:\strawberry\perl\vendor\lib .) at new.perl line 6.
BEGIN failed--compilation aborted at new.perl line 6.

So I download Twig.pm and put it in the inc folders. Still didn't work.
I suck at this