Skins don't display in drop-down

Hi, Igor I’m having an issue getting skins to appear in the drop down menu. I have ran the;

<?php echo (function_exists('glob'))?'yeah':'no';?>

that you discussed in this post http://wordpress.org/support/topic/cannot-change-skins?replies=8 and it returns yeah.

I have also made sure that all folders have 755 permission and all files have 644 permission.

What can I do? I’m using the Starkers Theme.

http://wordpress.org/extend/plugins/len-slider/