Maybe (I'm allmost convinced) that I the solution is quite easy but I can't see it.

I successfully load a form using UserAgent $ua.
With it comes a cookie that must be valid for the whole session.
I fillout the form and submit it by creating a new UserAgent $ub.
Within this 2. request the cookie is cheked many, many times!
And if the values of $ub aren't the same as of the first one
a new one is set and finally my last form is not accepted.

Again: during the three Requests: 1. Form, 2. Form and the final Fail/Success_Page
the value of the first cookie are many times (seen in traffic dump) checked.

My question now: How can I easily set the cookies of $ub and $uc to $ua
without saving and loading ev.thing to a file? This does not work:

$ub->cookie_jar = $ua->cookie_jar;
[download]

Thanks for your patience, Carl

use HTTP::Cookies;
..
$ua = LWP::UserAgent->new;
$ua->agent($MOZILLA);
$ua->cookie_jar(new HTTP::Cookies);
$res = $ua->request(GET $url); #the $ua->cookie_jar is set hereafter
$post = &fillForm(\$res, \%FW, $form); # fillout form

# Creating a new UserAgent $ub
$ub = LWP::UserAgent->new;
$ub->agent($MOZILLA);
$ub->cookie_jar(new HTTP::Cookies);
$ub->cookie_jar = $ua->cookie_jar; #crash
# now this cookie of $ub has to be the same as of $ua
# I just don't get it and
# I don't want to save and load a file due to permissions

$res = $ub->request($post);
$post = &fillForm(\$res,\%FW,'msgO',$nSMS); # fillout next Form

# create 3rd UserAgent $uc
$uc = LWP::UserAgent->new;
$uc->agent($MOZILLA);
$uc->cookie_jar(new HTTP::Cookies);
$uc->cookie_jar = $ub->cookie_jar; #crash

# Again this cookie must be the same as
# the 2 others before

$res = $uc->request($post);
...
[download]