I Received an Error Message on Yahoo Search

What Reasons are there to Explain this? Why Would this Happen?

[chad1027]

After 50 yahoo searches - I got this error

"Unfortunately, we are unable to process your request at this time. We apologize for the inconvenience. Please try again later."

Return to Yahoo!
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After about 10 minutes I can search Yahoo again and then after about 50 searches, it gives me this same error. Any ideas?