Maybe you did copy & paste incorrectly but ProxyPreserveHost needs to be on a new line, the server will refuse to start
ProxyPassReverse takes one, two or three arguments, a virtual path and a URL for reverse proxy behaviour
However, similar (fixed) configuration works for me. Did you name your balancer accodingly (ManagerBalancerName)?
Thanks, ah yes that is just a typo in the question, I have updated it
Can you show me what your config is that works?
The balancer name is correct, when I request a page from the vhost I just get a 404 - Not Found back from apache
I am using the same balancer in a different <VirtualHost> using the root of the app, and it works fine