help with sessions

[J_-]

i am having a problem building a shopping cart, i´m using php and mysql, when i select the items i want and go to the checkout screen and want to change the quantity of the items and press save changes i lose my session, i am using session_start() and tried with sesson_register, with the same result
anyone knows what might be the problem?

[driverdave]

How are you keeping track of your session?

cookies? trans SID? passing the SID yourself?

When you start your session, do you reference a specific SID?

[J_-]

i don´t reference any specific SID, so i think it´s trans SID, i have

; use transient sid support if enabled by compiling with --enable-trans-sid.
session.use_trans_sid = 1

in my php.ini