I have a Macbook Pro, OS X version 10.6.8. I am unable to login to a much frequented site on safari with a valid login and password. I discovered I can still login to my account on a PC, it recognizes my login name and password. For some reason, I can no longer get this to work on my MAC. I have emptied my cache and deleted all history. Anyone have an answer on how to fix this?

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