Hi,
After several post in an Apache Forum, I've solve any problem of my apache configuration to enable load balancer configuration.
It seems work but when I launch my galaxy application, I arrive in this web page :

Service temporarily Unavailable

And my log apache shows this :
[Tue May 29 09:37:32 2012] [error] (111)Connection refused: proxy: HTTP: attempt to connect to 127.0.0.1:8083 (localhost) failed
[Tue May 29 09:37:32 2012] [error] ap_proxy_connect_backend disabling worker for (localhost)
[Tue May 29 09:37:32 2012] [error] (111)Connection refused: proxy: HTTP: attempt to connect to 127.0.0.1:8082 (localhost) failed
[Tue May 29 09:37:32 2012] [error] ap_proxy_connect_backend disabling worker for (localhost)
[Tue May 29 09:37:32 2012] [error] (111)Connection refused: proxy: HTTP: attempt to connect to 127.0.0.1:8081 (localhost) failed
[Tue May 29 09:37:32 2012] [error] ap_proxy_connect_backend disabling worker for (localhost)
[Tue May 29 09:37:32 2012] [error] (111)Connection refused: proxy: HTTP: attempt to connect to 127.0.0.1:8080 (localhost) failed
[Tue May 29 09:37:32 2012] [error] ap_proxy_connect_backend disabling worker for (localhost)
It means that galaxy doesn't listen the port 8080, 8081 ...

I think it's my run.sh which cannot read my universe_wsgi.ini correctly. Because if it could read correctly, in my terminal I could see this type of line :

Handling web0 with log file web0.log...
Entering daemon mode...
Now, Idon't see that!
after the command GALAXY_RUN_ALL=1 sh run.sh --daemon,
 I just see : Entering Daemon mode.
So in my view,  it's not an Apache problem but a shell script galaxy problem.
Somedy has already met this problem ?
Have you a solution ?

Thank you.
Julie