No permission in /tmp (installation)

Hi,
I wanted to try piwik, but impossible to install it. I had (quite) same problem with phpmv2:
I “chmod 0777” all piwik directory, but still this error…
It creates a directory inside (…/templates_c) with no permission… so I have to write a PHP script to remove the dir…
thanks…

[edit: the owner of ‘templates_c’ is apache (???)… so it creates the file (like wrt097d97a09a880) but can’t write in it… style_emoticons/<#EMO_DIR#>/unsure.gif ]

Well, I deleted template_c and recreated with permissions 0777… now it’s ok. Hope this will be helpfull for the next style_emoticons/<#EMO_DIR#>/wink.gif