JHF 87 on which version?
I understand you attempted to modify $CVPNDIR/conf/ReverseProxy_conf/ReverseProxyConf.xml as described in Example 5.
I don't understand what you mean by "after modification and application of the configuration the added paths disappear."
Again, provide the exact steps you did with the result(s) that occurred after each step.
In other words, if you executed a command, show the precise output you received once that command was executed.
Screenshots may also be useful.
The more information you can provide here, the more likely we can assist you.