Hello
I have the same issue.

http://dinnerbone.com/minecraft/tools/status/
192.210.238.3:25665

It can be queried with other services, but not GT.
I am running a FTB Direwolf20 (1.6.4 ) server.

Query is enabled and the query / join port are both 25665

===============================
Query Results
Good news, your query came back successful! Here is what the server told me about itself:

Server Details
Server Software
MCPC+ on Bukkit 1.6.4-R2.1-SNAPSHOT
Main World Name
world
Players Online
0
Game Version
1.6.4
hostip
192.210.238.3
Message of the Day
DiamondGamers.net
Game Type
SMP
Server Port
25665
Game Name
MINECRAFT
Maximum Players
36
Mods & Plugins
EssentialsSpawn 2.13.1
SimpleVoteListener 2.6
EssentialsAntiBuild 2.13.1
PermissionsEx 1.20.4
Multiverse-Core 2.5-b678
Multiverse-SignPortals 2.5-b665
Dynmap-Essentials 0.70
Multiverse-NetherPortals 2.5-b675
Essentials 2.13.1
EssentialsProtect 2.13.1
Questioner 0.6
Dynmap-Towny 0.50
AdBlockPlus 1.0.1
EssentialsChat 2.13.1
Donate 1.0.0
Votifier 1.9
WorldEdit 5.6.2
WorldBorder 1.7.9
Towny 0.86.1.0_(1.6.4)
TownyChat 0.4
Multiverse-Portals 2.5-b699
Dynmap-WorldGuard 0.60
WorldGuard 5.9
BukkitCompat R22A
dynmap 1.9.4-69
Vault 1.2.31-b411
Lockette 1.7.12

Hello,

Your server is reporting query data, however the data is formatted slightly different than other Minecraft servers, which is causing GameTracker to reject the data.

Unless this becomes a wider problem, we cannot make query changes to accommodate a single server.

Here is what I would suggest:

1. Do you upgrade your Minecraft server frequently? Perhaps the next (or previous) version will resolve the issue.

2. Are you using a beta build? If so, is there a newer update available?

3. You could try restarting your Minecraft server. Perhaps a bad state somewhere is causing the problem.

Hopefully this helps.

Best regards.

I have the same question as you

This is why we we have the General Help and Guides & FAQs sections.

See:
My server will not add or shows as down, what should I do?

Minecraft Scanning - Adding Minecraft servers to GameTracker

thank you so much i fixed it by downloading minecraft apk at modsuper.com

My favorite game is Minecraft, I know a place that has a Minecraft mod apk version that never fails at all.