Need Steps to upgrade SQL Yukon 9.00.852 (Intel X86) to 9.00.1399.06

Hi SQL DBA,s

What are the step to upgrade ?

Microsoft SQL Server Yukon - 9.00.852 (Intel X86) version To
Sql 2005 Standard {9.00.1399.06}.

When I tries to backup and restore from this 9.00.852 version to Sql 2005 Standard {9.00.1399.06}.
It is giving me an error that this version is not compatible.

What we need to do know ?

Also let me know where I can download SQL Server Yukon - 9.00.852 (Intel X86) version so I can do the test on test box.

Thanks In advance.

You can try exporting and importing the data to a .sql file.sql