You can follow 'Upgrading' section of LiveCycle 9.0 documentation set @ http://help.adobe.com/en_US/livecycle/9.0/documentation.html
to find out how you can upgrade your existing LiveCycle server to LiveCycle 9.0
Hina's response deals with the technical issues of how to prepare for and execute a server upgrade from LiveCycle ES Update 1 (aka 8.2) to ES2 (9).
However, I'm not sure if that's really your question.
But it'd be worthwhile to know exactly what it is that you have so that we can give an appropriate answer.
I finally discovered the location to upgrade LiveCyle from v8.2 to v9. I installed it and received the gracious 720 day "trial" period. Also, a convenient link "Click here to purchase Adobe LiveCycle Designer ES". Eagerly following the link, (we have money) there is no place to purchase the upgrade and receive the licensed copy...only an upgrade to Acrobat X. We do plan on upgrading to X, but not right now. So, in the meantime, we'll work with the trial and pray it has full functionality.
Europe, Middle East and Africa