Ruby and Opengl samples

Hello,

i have installed ruby 1.8.2.15 with the one Click installer on my PC.
when I start the Script tess.rb becuase tess.rbw from
E:\ruby\samples\opengl
comes an error:

Microsoft Viusall C++ Runtime Libary
Runtime Error

Programme e:\ruby\rubywin.exe

This application has requestes the Runtime to terminate it in an unusual
way.
Please contact the application’s support team for more information.

What must I do, to run this Script ??

all the Other examples from this Folder runs perfect !!!

Greetings

Robert