fix phpsessid error

I have a site that was built on my server which uses php 5, mysql and railo (open source coldfusion). The site uses jquery (using shadowbox) to display a popup after a timer counts up to 30 seconds. The site works just fine on a temporary domain which is on my server. However, after placing the site on a new account on the server, when the popup comes up, I get an error saying the following: key [PHPSESSID] doesn't exist in struct (keys:cftoken,cfid) I just need someone to help solve this error or direct me on how to fix this issue. The server is running apache, php, railo, mysql db, webmin, virtualmin I've also attached the error I'm seeing. Again, it works just fine on the other domain (same server) but not on this new domain I set up. I need this fixed asap. Please let me know.