Unfortunately, the game download from our website is only the base client and is designed to be only used with the free trial. Because you are using that installation, you will be unable to access any expansions, even the ones that are registered on the account. As of now, there is currently no free client download available for FINAL FANTASY XI. The only suggestion we would be able to provide would be to acquire the installation media. As the new expansion, Seekers of Adoulin is also releasing with an Ultimate Collection, you can purchase that to not only get access to any missing content, but also regain access to the other content.