I need to increase the session length but nothing I've tried has worked. This is on a vps so while technically its a shared server, I don't think it should suffer from the problems associated with shared servers. Also the site is new (still under development) and so has negligible traffic.
gc_maxlifetime is set to 0 (I read on php.net this would make the session last til the browser was closed)
gc_divisor = 100
gc_probability = 0
Is there something else I should be setting? (Basically, the client just spent 40 minutes filling in a form, only to be bounced back to login)