Migrating from ColdFusion MX7 to ColdFusion 9. Any issues?

I'm planning a migration on a server from ColdFusion MX7 to ColdFusion 9. Does anyone know which steps I should take in order to achieve this without major issues? I can't find anything on the web that talks about this and I don't want to jump into this task without knowing what I'm up against.

Any suggestions, link to articles, etc. would be very much appreciated.

Thank you!