Its Me wrote:
> What do I need to setup to debug in 1.8.1 with using RDE?
> 
> Currently I get:
>     ruby.exe: No such file to load -- debug2 (LoadError)
> 
> Thanks!
> 
> 
> 
> 
> 

look here:
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/73100

this sounds similar to your question..