Character set issues in filepath using ruby on XP

I'm trying to do a File.exist?(file) but my ruby script开发者_如何学编程 doesn't find the file because of \, spaces, - and . in the filepath. I'm a beginner in ruby and need some help to fix this.

I assume it has to do with your OS, more then with Ruby.

file tèst.rb:

puts "Hello"
puts "smørebrød"

used in irb:

irb(main):001:0> require "tèst.rb"
Hello
smørebrød

Ruby can include a file with name tèst.rb just fine.

irb(main):005:0> f = File.new("ÅÄÖ.txt")
irb(main):006:0> f.each {|l| p l }
    "\"Hej Verden\"\n"

loading a file with your requested characters and printing its lines (p l) works just fine. I am running ruby 1.8.7 on Ubuntu Linux. That is a rather old Ruby.