Bug in instaling templates

[George|SG]

Firstable sorry for my bad English...
I have a little problem - I'd installed 'serendipity' and everything is working.
I have problems only with the themes. When I click on "Change Style" it's showing error:

Warning: natcasesort(): The argument should be an array in /home/www/georgesg.tollfreepage.com/include/functions.inc.php on line 78

Warning: Invalid argument supplied for foreach() in /home/www/georgesg.tollfreepage.com/include/admin/templates.inc.php on line 33

please help me.
Thanks in advance

[garvinhicking]

This can happen if you did not properly configure your Serendipity Paths.

Tell me which paths you have entered in your s9y configuration, especially the "Path to your serendipity directory" and the Template directory.

Best regards,
Garvin