Helo i recieved from mtgox support
This error occurs only when there is a threat to our website or your IP is accessing our website too many times per minute.
But i i do nosend any request to mtgox looks like it is mistake. Can support unblock my ip?
What else can i do to slove problem?
Go to a better exchange instead. For example bitstamp.net or bitcoin.de - they are cheaper, faster, and better than MtGox.