Just like the error message says, LT2009 is not designed for or supported in Win7 64bit. It's not a secret, read the system requirements for LT2009:
http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=15460215&linkID=9240817#section14Microsoft offers tips on how to install old software in Win7 using Win7's Comatibility mode: visit Microsoft's website for details.
Other users love a 3rd party add-on called LONGBOW.
YouTube has many tips on trying what you want.
Google Search offers more suggestions too,
Help yourself. Post back if you still get stuck after trying a handful of those ideas.