Ruby's ARGV can be empty on windows depending on a way to run script

My demo.rb: ``` puts ARGV.size ARGV.each do |a| puts "Argument: #{a}" end ``` The result depends on how we run a script: ``` > demo.rb foo bar 0 > ruby demo.rb foo bar 2 Argument: foo Argument: bar ``` Why this happens? And can some thing be done with this? EDIT: Thanks to all replies! Here my settings: ``` >assoc .rb .rb=rbFile >ftype rbFile rbFile="c:\ruby-1.8.6\bin\ruby.exe" "%1" %* ``` So it looks right. But I have discovered that ``` >demo.rb foo bar ``` starts process with such Command Line: ``` "C:\ruby-1.8.7\bin\ruby.exe" "c:\demo.rb" ``` Notice, that .rb associated with 1.8.6, but 1.8.7 is started. So I guess some thing else is messed up?