PP, IPB2 on different subdomains
I have a problem with integrating PP and IPB2.
I followed the install script, and went OK.
When I login from PP, it says successful login, redirecting.. And then PP main page says 'Users browsing the gallery: 1 unregistered user ' and I cannot access the admin page (and I'm admin of my forum).
Since I want to introduce this service for a community (15k+ users), first I want to test the whole stuff before moving live.
Currently, my forum is on a subdomain (forum.bbbbb.ccc) and PP will be on another subdomain (album.bbbbb.ccc).
The cookies from PP and IPB are almost identical (of course, the timestamps are different), but they both have my loginname and userid.
Could you tell me what to do?
Thank you in advance.