Official Buffalo Technical support for EMEA (Europe / Middle East and Africa) is not based in Iran, its based in UK/Ireland.
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I didn't say that I'm Official Buffalo Technical support for EMEA!
But someone should answer Iranian Buffalo Customers, they can't contact Ireland support center.
I do it in Iran and Support them, I always search on the net and solve their problems,
In Iran everybody knows me as Buffalo Technical Support.
Anyway it wasn't my answer! And I've just solved my problem.
Thank you for your answer.