Plugin's scoreboard conflict

I tested a scoreboard plugin on a separate server and it works nicely . But on the main server , it doesnt. List of plugins(Please tell me what uses scoreboards!)

Code:

BanItem
Buycraft
ChestShop
Citizens
Clearlag
Essentials
EssentialsChat
EssentialsAntiBuild
EssentialsProtect
EssentialsSpawn
FactionChat
Factions
HorseProtect
Lockette
MultiverseCore
MultiversePortals
NoCheatPlus
PVPPack
PermissionsEx
Residence
ResidenceSigns
ScheduledAnnouncer
Sentry
SimpleVoteListener
TagAPI
Votifier
Vault
WorldBorder
WorldEdit
WorldGuard
factions
mcore