1. Did you read the entire
Addon page for Leatrix Latency Fix and follow all instructions?
2. Was there anything you didn't understand?
3. Did you run the checker script to see the list of network interfaces which Leatrix Latency Fix has modified successfully?
4. Did you try contacting the author to see if she could help you with the problem? Either by leaving a comment on the addon page here on WOWI, or a private message?
As far as the problem you are having... is there NO DIFFERENCE in the latency now than before you installed it? Or are you just not experiencing any performance improvements and think the program is not working?
It could be that Leatrix was installed successfully but it's just not having very much affect on your RO performance. Perhaps your RO performance is affected by an issue not related to ping, like graphics. Have you tried turning graphics down and seeing if that helps?