Licensing between Backup Exec 2010 R2 and R3

Hi Guys,

Can I use core license and windows and lotus agents of BE 2010 R2 to BE 2010 R3?

What about using BE 2010 R3 core license, deduplication option license and storage provisioning option to BE 2010 R2? I tried it, and I was able to add the core license and option licenses, but when I try to backup, its saying something like "client deduplication is enabled but I cannot use it" Is it due to license versions?

Regards