CGI::Session likely is installed properly, as your script compiles. As you still didn't provide a self-contained, minimal script that exhibits the behaviour, I can't reproduce your problem. Also, you still keep the value of $perl_directory to yourself, so I can only guess that it is either a relative path, and your webserver does not have the same current directory as you have when you run your script through the shell, or that it is a permission issue and the user your webserver runs as does not have the same permissions as you have on $perl_directory. But then again, you seem bent on blaming this on a CGI::Session compilation issue again and again, so maybe you'll find the solution there.

Not a permissions issue else the perl script would have failed.

use English;
use Cwd qw(getcwd);
use CGI qw/:standard/;
use CGI::Carp qw(warningsToBrowser fatalsToBrowser);
#-- ppm install CGI::Session
use CGI::Session;

    our $session;
    our $query = new CGI();
    our $perl_sessions = "C:/webtmp";
    if (!(defined($query->cookie("wweb")))) {
        $session = new CGI::Session("driver:File", undef, {Directory=>
+$perl_sessions});
        $cookie = $query->cookie(-name   => "wweb",
                             -value  => $session->id);
    }
exit(0);
[download]

My bet still is on the permission issue. Reading the CGI::Session documentation for ->new, it points to the ->errstr class method as a way of finding why the constructor might fail. So, why aren't you checking errors? What does the following write to the error log and/or output?

use strict;
#use English;
use Cwd qw(getcwd);
use CGI qw/:standard/;
use CGI::Carp qw(warningsToBrowser fatalsToBrowser);
#-- ppm install CGI::Session
use CGI::Session;

our $session;
our $query = new CGI();
our $perl_sessions = "C:/webtmp";
if (!(defined($query->cookie("wweb")))) {
        $session = new CGI::Session("driver:File", undef, {Directory=>
+$perl_sessions})
            or die "Couldn't create CGI session: " . CGI::Session->err
+str;
        $cookie = $q->cookie(-name   => "wweb",
                             -value  => $session->id);
    }
exit(0);
[download]

Update Also looking at the CGI::Session documentation again, there is no CGI::Session::Driver::File but only CGI::Session::Driver::file, so maybe your error is in specifying "driver:File" instead of "driver:file".

You're supposed to use CGI->... or CGI::Session->errstr()