First picture:
all is well (make sure your htaccess content is as suggested)

Second picture: we have a problem there
Maybe, just may be, shorthanded tag is disabled on your server

Go to admin/ssu.php, line 180
Replace
PHP Code:
Reset only <?= $parser ?> cache: <a href="<?php echo zen_href_link(FILENAME_SSU,"action=reset_cache&folder=$parser"); ?>">Click here</a><br />
by
PHP Code:
Reset only <?php echo $parser; ?> cache: <a href="<?php echo zen_href_link(FILENAME_SSU,"action=reset_cache&folder=$parser"); ?>">Click here</a><br />