print "Content-type:text/html\n\n";

use strict;
#use LWP::Simple; 
use LWP::UserAgent;
use CGI;
use CGI::Carp qw(fatalsToBrowser);

my $cgi  = new CGI;
my $var  = CGI::param('wert');

my $url1 = 'https://server.xyz.de/psp.php'; 
my $url2 = 'wert=$var&save_report=yes' ;


my $ua = LWP::UserAgent->new;
   $ua->agent( "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:11.0) Gecko Firefox/11.0" );
 
   $ua->timeout(10);
   $ua->requests_redirectable(undef); # Redirects ausschalten!
   
   
      
my $response = $ua->post($url);

     
   if ($response->is_success) {
    
          print $response->content; # or whatever
  }
   else {
     die $response->status_line;
   }