Scene Graph

Hello, I’m trying to build GUI with Scene Graph. Tutorial says that this API is available after 6.0 version. I’m on Roku Stick with software version 6.2 but when I run examples from tutorial Debug Console prints> BRIGHTSCRIPT: ERROR: Runtime: unknown classname “roSGScreen”
how can I fix this?

Read http://forums.roku.com/viewtopic.php?f=34&t=88621, the first post, and send Shawn the request to participate in the beta as it describes.