What steps will reproduce the problem?
1. Load Character.
2. type: /qh cartwp - to disable it
3. type: /qh cartwp - to enable it

What is the expected output? What do you see instead?
Expected to see the floating arrow that points directions.

What version of the product are you using?
0.60

Do you have an error log of what happened?
msg: Interface\AddOns\QuestHelper\cartographer.lua:28 attempt to call global 'GetMapVirtualZones' (a nil value)
toc: 0.60
v: 0.60
game: 3.0.2
locale: enUS
timestamp: 2008-10-16 01:13:46

[C]: in function `GetMapVirtualZones'
Interface\AddOns\QuestHelper\cartographer.lua:28 in function `init'
Interface\AddOns\Cartographer_Waypoints\Waypoint.lua:12 in function `new'
Interface\AddOns\QuestHelper\cartographer.lua:14 in function `func'
Interface\AddOns\QuestHelper\dodads.lua:588 in function `AddWaypointCallback'
Interface\AddOns\QuestHelper\cartographer.lua:56 in function `EnableCartographer'
Interface\AddOns\QuestHelper\help.lua:332 in function `?'
Interface\AddOns\QuestHelper\help.lua:641 in function `QuestHelper_SlashCommand'
Interface\AddOns\QuestHelper\help.lua:655 in function `?'
Interface\FrameXML\ChatFrame.lua:3191 in function <Interface\FrameXML\ChatFrame.lua:3144
[C]: in function `ChatEdit_ParseText'
Interface\FrameXML\ChatFrame.lua:2911 in function `ChatEdit_SendText'
Interface\FrameXML\ChatFrame.lua:2932 in function `ChatEdit_OnEnterPressed'
[string "*:OnEnterPressed"]:1: in function <[string "*:OnEnterPressed"]:1>

addons:
  Atlas, v1.12.2
  AtlasBattlegrounds, v1.12.2
  AtlasDungeonLocs, v1.12.2
  AtlasFlightPaths, v1.12.2
  AtlasOutdoorRaids, v1.12.2
  AtlasLoot, vAtlasLoot Enhanced v5.00.01
  Bartender4, v4.1.2
  ButtonFacade, v0.1Alpha
  Cartographer, vr2255
  CartographerBattlegrounds, v2.0
  CartographerCoordinates, v2.0
  CartographerFoglight, v2.0
  CartographerGroupColors, v2.0
  CartographerGuildPositions, v2.0
  CartographerInstanceLoot, v2.0
  CartographerInstanceMaps, v2.0
  CartographerInstanceNotes, v2.0
  CartographerLookNFeel, v2.0
  CartographerNotes, v2.0
  CartographerProfessions, v2.0
  CartographerWaypoints, v2.0
  CartographerZoneInfo, v2.0
  ClosetGnome, v1.0.73605
  FuBarBagFu, vv1.1
  FuBarClockFu, v3.0
  FuBarDurabilityFu, v2.0
  FuBarFuXPFu, v3
  FuBarGroupFu, v1
  FuBarHeyFu, v1.5
  FuBarLocationFu, v3.0
  FuBarMoneyFu, vv1.2
  FuBarPerformanceFu, v2.0
  FuBarTimerFu, v3
  FuBar, v90003
  GrimReaper, v2.0 56
  kgPanels, v1.0
  LibFuBarPlugin30, v3.0
  OneBag3, v3.0.0a
  oRA2, v2.0.$Revision: 612 $
  Prat30, v3.0 (Beta Version)
  Prat30HighCPUUsageModules
  Prat30Libraries
  Quartz, v0.1.0
  QuartzBuff, v1.0
  QuartzFlight, v1.0
  QuartzFocus, v1.0
  QuartzGCD, v1.0
  QuartzInterrupt, v1.0
  QuartzLatency, v1.0
  QuartzMirror, v1.0
  QuartzPet, v1.0
  QuartzPlayer, v1.0
  QuartzRange, v1.0
  QuartzSwing, v1.0
  QuartzTarget, v1.0
  QuartzTimer, v1.0
  QuartzTradeskill, v1.0
  QuestHelper, v0.60
  RatingBuster, v1.4.0 (r175)
  Recount, v932
  Squeenix, v3.0.1.8
  WhoLib, v2.3.0
  XPerl, v3.0.0h
  XPerlArcaneBar
  XPerlPartyPet
  XPerlParty
  XPerlPlayerBuffs
  XPerlPlayerPet
  XPerlPlayer
  XPerlRaidAdmin
  XPerlRaidHelper
  XPerlRaidPets
  XPerlRaidFrames
  XPerlTargetTarget
  XPerlTarget
  DBMAPI
  ZOMGBuffs, v20
  ZOMGBuffsBlessingsManager, v$Revision: 20 $
  ZOMGBuffsBlessings, v$Revision: 20 $
  ZOMGBuffsLog, v$Revision: 20 $
  ZOMGBuffsBuffTehRaid, v$Revision: 20 $
  ZOMGBuffsSelfBuffs, v$Revision: 20 $

Please provide any additional information below.

I tried like you said and disabled Cartographer_POI in my AddOns from even loading.