I am not exactly sure what causes the problem in your environment, I have no problem to load your configuration file from our test server.
Maybe LSWS has difficulty to detect the IP address assigned to that VPS?
Can you try this to verify it?
Please change "Listen 80" directive in the configuration file to "Listen 10.0.10.122:80", see if it works, if it works, it is the problem I mentioned.
That's pretty strange that LSWS has not problem to detect IP addresses in other virtuozoo VPS environment.