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when ı'm change some thing ı give error

Warning: file_put_contents(./datas/cache/templates/skins_jaxcoder_footer.tpl) [function.file-put-contents]: failed to open stream: Permission denied in /home/pow3r/domains/xxxx/public_html/system/xtemplate.php on line 170

but ı cant see not thing.my xtemlate.php

is about my codes or my server who can help me??