Spring RTS Engine

I solved this problem, with install of SDL library from package .tar.gz : (./configure - make - make install)
http://www.libsdl.org/download-1.2.php

the answer of terminal is:
libsdl1.2debian is update at latest version
I thought previously to update this pakage but I have't results.
Thanks anyhow

Hi.
I have a big problem with spring in ubuntu 9.04 (Jaunty)
When i start the spring engine, i've this problem:
xmessage
Could not initialize SDL

How do i fix?
Thanks so much :)