The query system does not seem to support querying servers using bungeecord. Other sites like planetminecraft work fine.

The ip is play.mc-sg.org

Any ideas?

We have a guide set up for assisting you with setting up your server for querying. http://www.gametracker.com/games/minecraft/forum.php?thread=58741

Please ensure:

1. You are running the most recent version of the server
2. You are not running extra query mods like minecraftviewer
3. You have set up scanning properly and have verified you are entering the correct join and query ports.

If you still have troubles, please post the full server information (IP:Port:QueryPort). Please also link to the mod you are running and specifics on how it has altered the built in gamespy query protocol.