Thanks to Al, Chris and Gaius, I made a copy of what was installed in my laptop: the 3 files in sketchup/plugin and all folder the Render Plus System in Program Files and now it s working. I think that something was not installed in the render plus system....

Hello Everybody, hello Al

I am new in Sketchucation...
I am a long time user of sketchup since v2 from france but never tried ruby plug before. But since I red Daniel Tal book Google sketchup for Site Design I am very in trying plug in where I learned about amazing and powerfull Fred tools and more. I went to Sketchucation to download extensions plug in, I would to thank Gaius to help me to register.

I loaded fractal Tree Maker it is a very nice and useful tools. For me it works on my laptop a Dell Inspirion 1720 with vista, but I did not succeed to make it work on my old desktop a gateway GT 5220 with XP pro. Here the message.
Error Loading File RpTreeMaker_loader.rb
126: The specified module could not be found. - H:/Program Files/Google/Google SketchUp 7/Plugins/Win32API.so