Sessions [gallery or otherwise] are a temporary thing. They exist from the time you login until you close the browser. Then they are gone.

You really should have told us what version of Zenphoto you are running. Most likely it is not the one with the session fix so you are seeing that issue.

Sorry for resurrecting an old thread... but for the benefit of people still coming across this problem I'd like to add something.

I had the exact same problem as above. The time/date on my test server was a few months out which completely breaks either the session or the cookie handling. Correcting the server-side date fixed the issue.

Thanks for the info. Had not heard of this problem before. How did you figure this out?