I was trying to run the simple window script found at the Ruby Tutorials section and also a custom script but I always get this weird error message. If I run the same script on any *buntu GNU/Linux OS I don't get this error message.

~$ ruby1.9.1 gosuwindow.rb
X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  1 (X_CreateWindow)
  Serial number of failed request:  160                                                                           
  Current serial number in output stream:  161

I'm completely sure I didn't forget to install any package.

~# apt-get install g++ libgl1-mesa-dev libpango1.0-dev libboost-dev libsdl-mixer1.2-dev libsdl-ttf2.0-dev ruby1.9.1-dev
Reading package lists... Done
Building dependency tree      
Reading state information... Done
libboost-dev is already the newest version.
g++ is already the newest version.
libgl1-mesa-dev is already the newest version.
libpango1.0-dev is already the newest version.
ruby1.9.1-dev is already the newest version.
libsdl-mixer1.2-dev is already the newest version.
libsdl-ttf2.0-dev is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Can anyone lend me a hand here?