Ubuntu – error while loading shared libraries libSDL-1.2.so.0

I am trying to install ioquake on my ubuntu server.

When I try to run it, I get this message:

# ./ioquake3
./ioquake3.x86_64: error while loading shared libraries: libSDL-1.2.so.0: cannot open shared object file: No such file or directory

I thought I had everything working right, here is where the libSDL is:

# cd /usr/lib64
# /usr/lib64# ls -l
total 2308
lrwxrwxrwx 1 root root      15 Oct 15 00:25 libSDL-1.1.so.0 -> libSDL-1.2.so.0
lrwxrwxrwx 1 root root      20 Oct 15 00:25 libSDL-1.2.so.0 -> libSDL-1.2.so.0.11.4
-rwxr-xr-x 1 root root 2358903 Jan 19  2012 libSDL-1.2.so.0.11.4

And my path:

# echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/lib64

What am I doing wrong?