[Typo3] Problem with directmail cronjob - non-existent class: t3lib_cs

[Rolf Bartusel]

Hi,

I have some problems in bringing the directmail dmailerd.phpcron to 
work. The cronjob ist still not active, I start the file on the command 
line.

The first error in the dmailerd.phpcron was, that the var

$dir = dirname($HTTP_ENV_VARS["_"]);

did not work. I got a message "Wrong path...", but found a solution in 
the community and changed it to hard coded complete file path:

$dir = dirname('/usr/[...]/typo3/ext/direct_mail/mod/dmailerd.phpcron');

Now, when starting dmailerd.phpcron I get the error message

"Fatal error: Cannot instantiate non-existent class:  t3lib_cs in 
/usr/[...]/typo3/t3lib/class.t3lib_div.php on line 3501"

The reason for this error comes from the last line in dmailerd.phpcron:

$htmlmail->runcron();

There is no class t3lib_cs in class.t3lib_div.php, but there is a file 
with this class named class.t3lib_cs.php, but I can't find the place 
where to fix this. Any idea?

My system:
OS Linux
Typo3 3.8.0
PHP Version 4.3.3
MySQL 3.23.49
Apache 1.3.20

Regards, Rolf