joomla session directory problem - Joomla! Forum - community, help and support

my website works on share space,but found share space session directory unwriteable.

what shall do?

if cannot login back-end, correct sessions.save_path directory writable.
contact host make sessions.save_path directory writable or
at apache webservers it's possible override default session.save_path php.ini, using .htaccess.
see: http://forum.joomla.org/index.php/topic ... #msg562118

if site works ok, including /administrator back-end: nothing.
if in future authentification error might appear, know start looking.