Sessions

I am in the process of integrating wordpress into one of clients sites. I made a theme to match the current website, and included the menus and utility bar. In the utility bar there are font size buttons. They use a session to keep track of which setting the user chose so it can load the proper CSS style. The problem is when the user is in the wordpress page the session appears to be empty.

Instead of including the code I tried putting directly into the template file. This caused the buttons to actually change the font size. However, now when the user clicks on an article, the session seems to reset.

Register_globals is off, and I tried adding session_start(); to the config file. Any ideas?

Thanks