You should run with warnings on. I don't think that simple_request is even an actual method. Scanning through the source of my LWP it's not even there. It's a method of LWP::UserAgent. You should be using LWP::UserAgent instead of just LWP. Try something like this.

#!/usr/bin/perl
use LWP::UserAgent;
use HTTP::Request::Common;
  
my $ua = new LWP::UserAgent;
 
my $r = $ua->request(POST 'http://www.somesite.com/Login.jsp', Submit=
+>'Sign in', 
requiredUserName=>'123abc', 
requiredPassword=>'abc');

if ($res->is_success) {

}else{

}
[download]

-Lee

"To be civilized is to deny one's nature."