Forumlar / Cotonti / Support / index.php error

okay. i found out what i did wrong but.. now i get

Fatal error: Uncaught exception 'Exception' with message 'Your "./datas/cache/templates/" is not writable' in /home/a3604698/public_html/system/xtemplate.php:184 Stack trace: #0 /home/a3604698/public_html/system/xtemplate.php(39): XTemplate->restart('skins/sed-light...') #1 /home/a3604698/public_html/system/header.php(92): XTemplate->__construct('skins/sed-light...') #2 /home/a3604698/public_html/system/core/index/index.inc.php(34): require_once('/home/a3604698/...') #3 /home/a3604698/public_html/index.php(20): require_once('/home/a3604698/...') #4 {main} thrown in /home/a3604698/public_html/system/xtemplate.php on line 184

and other people said they got this error also here

http://www.cotonti.com/docs/en/admin/install_guide?highlight=error

HELP!!!!!!

Added 36 minutes later:

SOLVED SOLVED SOLVED SOLVED SOLVED!!!!!