Can't Access My Yahoomail

Since two days now, i cannot access my yahoomail. Each time i try to login, the error message i get is like this =     
                                                                                         
Sorry, Unable to process request at this time -- error 999.
  Please try again here.         

If you continue to experience this error, it may be caused by one of the following:

You may want to scan your system for spyware and viruses, as they may interfere with your ability to connect to Yahoo!. For detailed information on spyware and virus protection, please visit the Yahoo! Security Center.
This problem may be due to unusual network activity coming from your Internet Service Provider. We recommend that you report this problem to them.
While this error is usually temporary, if it continues and the above solutions don't resolve your problem, please let us know.

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Please try Yahoo! Help Central if you need more assistance




 Please anybody with an ideao of what i should do?

Haba Google? the poster say yahoo, well i suggest u move to yahoo mail classic @poster.

lol
sorri i cnt help yo