Originally posted by PriMaTe
Hey, try calling an electrician and asking them or have them come and take a look or something cause from what the other posters are saying it seems like its your electrical wiring. If the outlet isn't grounded properly it should be an easy fix shouldn't it? Unless there isn't a ground wire there that you can connect to a better ground. I'm no electrician though, good luck.
Yup, you're dealing with a potentially dangerous situation there and I'd definately seek the help of an Electrician.