Hello smart,
thank you very much for your reply.
I'm a rookie in programming and that template is my first one. So I'm very sorry about that falt of mine.
If I activate a Joomla Template by example Ja_Purity, JComments works very well.
And you're right the libraries of JComments aren't included in the sourcecode of my own template.
How can I change that for future and other Modules or Components? Because I have the feeling that this problem happens oftener. Do I have to include those libraries everytime by my own in the head of my index.php? Or exists there a trick that every Component or Module must include their libraries automatically?
Thank you again for your advice and help.
sincerely yours,
pyretta
EDIT April 18, 2010, 16:02:12: I try to solve the problem with including the missed libraries by my own in the head of my index.php. Posting of comments are now possible, but if I publish the comments from backend, the page doesn't apears anymore.

Do I unpblish the comment again, the site apears like nothing ever happens...
I include following codesnippets:
<script type="text/javascript" src="/components/com_jcomments/js/jcomments-v2.1.js?v=2"></script>
<script type="text/javascript" src="/components/com_jcomments/libraries/joomlatune/ajax.js"></script>
<script type="text/javascript" src="/media/system/js/mootools.js"></script>
<script type="text/javascript" src="/media/system/js/caption.js"></script>
That codesnippets I've found in the sourcecode of my site with Ja_Purity-Template.
If I do the same, just with Ja_Purity-Template ... the comment would be shown like it should be and the site apears normally.
What the f*** did I done with my template that it is so meanly working?