Error installing FXRuby

[pplers]

[CODE=linux][root@localhost FXRuby-1.6.11]# ruby install.rb config
install.rb: entering config phase...
---> lib
---> lib/fox16
<--- lib/fox16
<--- lib
---> ext
---> ext/fox16
/usr/bin/ruby /home/my_username/Desktop/FXRuby-1.6.11/ext/fox16/extconf.rb
can't find header files for ruby.
config failed
'system /usr/bin/ruby /home/my_username/Desktop/FXRuby-1.6.11/ext/fox16/extconf.rb ' failed
Try 'ruby install.rb --help' for detailed usage.
[root@localhost FXRuby-1.6.11]# [/CODE]

I installed FOX correctly (i think), but i don't know why FXRuby won't install

Any help ??

[pplers]

already fixed, delete this post xD

p.s: i needed to install a dev package