[NTG-context] texmfstart.exe vs. texmfstart.rb

Hi Hans and Taco, Thanks to all your guidance and a lot of trial and error, now I have a SciTE under windwos XP which works. There is one strange feature though. I had to put the .exe version of texmfstart into the scripts ruby scripts folder so that my files get compiled. SciTE can't understand that texmfstart.rb is there and ruby is installed. Before I copy the .exe version to this directory, I could run all texmfstart commands from the command line without any problem, but from within SciTE the commands won't run. What is the difference between the two versions? And why SciTE can't understand that ruby scripts are in system path and run them? Best regards, -h