tinyMCE doesn't show H4-H6 (in version 5.6.3.4)

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HI all,
I have extended the headings in the tinyMCE from H1-H3 to H1-H6 (5.6xx till 5.6.3.1).
Now in a new installation only the headings H1-H3 will shown.
What I´m doing wrong?
$textEditorOptions = array_merge($textEditorOptions, array(
                                'spellchecker_languages' => '+English=en',
                                'theme' => 'advanced',
                                'plugins' => 'safari,spellchecker,pagebreak,style,layer,table,save,advhr,advimage,advlink,emotions,iespell,inlinepopups,insertdatetime,preview,media,searchreplace,print,contextmenu,paste,directionality,fullscreen,noneditable,visualchars,nonbreaking,xhtmlxtras', //,template,imagemanager,filemanager
                                'theme_advanced_buttons1' => 'cut,copy,paste,pastetext,pasteword,|,search,replace,|,undo,redo,|,styleselect,formatselect,fontselect,fontsizeselect,', //save,newdocument,help,|
                                'theme_advanced_buttons2' => 'bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,|,bullist,numlist,|,outdent,indent,blockquote,|,link,unlink,anchor,image,cleanup,code,|,forecolor,backcolor',
                                'theme_advanced_buttons3' => 'tablecontrols,|,hr,removeformat,visualaid,|,sub,sup,|,insertdate,inserttime,|,ltr,rtl,',
                                'theme_advanced_buttons4' => 'charmap,emotions,iespell,media,advhr,|,fullscreen,preview,|,styleprops,spellchecker,|,cite,del,ins,attribs,|,visualchars,nonbreaking,blockquote,pagebreak', //insertlayer,moveforward,movebackward,absolute,|,|,abbr,acronym,template,insertfile,insertimage
                                'theme_advanced_blockformats' => 'p,address,pre,h1,h2,h3,h4,h5,h6,div,blockquote,cite',
                                'theme_advanced_fonts' => 'Andale Mono=andale mono,times;Arial=arial,helvetica,sans-serif;Arial Black=arial black,avant garde;Book Antiqua=book antiqua,palatino;Comic Sans MS=comic sans ms,sans-serif;Courier New=courier new,courier;Georgia=georgia,palatino;Helvetica=helvetica;Impact=impact,chicago;Symbol=symbol;Tahoma=tahoma,arial,helvetica,sans-serif;Terminal=terminal,monaco;Times New Roman=times new roman,times;Trebuchet MS=trebuchet ms,geneva;Verdana=verdana,geneva;Webdings=webdings;Wingdings=wingdings,zapf dingbats',
                                'theme_advanced_font_sizes' => '1,2,3,4,5,6,7,8,9',
                                'theme_advanced_more_colors' => 1,
                                'theme_advanced_toolbar_location' => 'top',

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