No building owners

When someone on my server builds a structure or foundation my server doesn't make the user member of the object. This results in players who can't teleport home because they set there homes on other players foundations.

How can I solve this ?

Plugin list:

AdminSpawn
AFK
Clans
CraftingController
cupboardRadius
DeathNotes
DoorShare
GatherManager
InfoPanel
InventoryViewer
ItemSkinRandomizer
Kits
MagazinBoost
NoDecay
NTeleportation
Prod
QuickSmelt
RemoverTool
SignArtist
StackSizeController
TragetPractice
Tickets
Trade
XmasTime
XpBooster
XPManager