Hi

edit the file /themes/element/functions.php
find these lines:
// images innerhalb von TextArea's 'entwerten', damit diese nicht ersetzt werden
$match = 0;
$theme_template['template'] = preg_replace_callback('#(<textarea[^>]*>.*)(\.(?:gif|jpe?g|png))?(.*</textarea>)#isU', 'theme_killimages', $theme_template['template'], -1, $match);
// Struktur des Ordners sys_images analysieren
// ersetzen und Ausgabe in das template-Array speichern
$theme_template['template'] = theme_replace_parts($theme_template['template'], theme_getmore_parts());
// images innerhalb von TextArea's wieder herstellen
if ($match) {
$theme_template['template'] = theme_unkillimages($theme_template['template']);
}
// falls der sys_images-Pfad doppelt ersetzt wurde
$folder = MX_THEME_DIR . '/sys_images/';
$theme_template['template'] = preg_replace("#($folder){2,}#", '$1', $theme_template['template']);
replace them with the 2 following lines:
/* sys_images ersetzen */
$theme_template['template'] = theme_replace_sysimages($theme_template['template']);
or use attached functions.php

EDIT: i've change the lines and the attached file !!