Is my hall effect sensor working?

hi!
i have couple of these linear hall effect sensors ah49e.
i followed http://www.arduino.cc/playground/code/halleffect

the magnets using grinder , refrigerator (sitting on door hold pictures).
is magnets week? cuz don't notice big changes, e.g. can't north-pool show up.

quote

mm: 710  = b in gauss: 405 south-pole
mm: 710  = b in gauss: 405 south-pole
mm: 710  = b in gauss: 405 south-pole
mm: 710  = b in gauss: 405 south-pole
mm: 710  = b in gauss: 405 south-pole << letting magnet touch it
mm: 711  = b in gauss: 407 south-pole
mm: 708  = b in gauss: 401 south-pole
mm: 710  = b in gauss: 405 south-pole
mm: 710  = b in gauss: 405 south-pole
mm: 712  = b in gauss: 409 south-pole
mm: 709  = b in gauss: 403 south-pole
mm: 709  = b in gauss: 403 south-pole
mm: 711  = b in gauss: 407 south-pole
mm: 709  = b in gauss: 403 south-pole
mm: 710  = b in gauss: 405 south-pole
mm: 710  = b in gauss: 405 south-pole
mm: 712  = b in gauss: 409 south-pole
mm: 707  = b in gauss: 400 south-pole
mm: 710  = b in gauss: 405 south-pole
mm: 708  = b in gauss: 401 south-pole

nevermind, me has wire wrong.
admin can remove thread if want 

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