Version 3.0 doesn't work on WordPress 3.5.1

The preview is blank:

If I activate rtPanel 3.0 all the pages of the blog turn blank.

Thanks in advance.

Looks like your rtPanel hasn't been downloaded completely. Try re-downloading it and check.

Downloaded zip file and uploaded the folder via Ftp. Now it works!

Maybe there's a problem with the update in WP Dashboard.

Thanks a lot!