I think that happens to everyone. Just take 5 it will come back. It's not common though but if there is a hiccup with the servers or ISP you'll get that message.
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"Give a man a fish; you have fed him for today. Teach a man to use Google Earth and the BBS and he won't bother you for months, if ever, again." - Mighty Pete 01000111 01110010 01100101 01100101 01110100 01101001 01101110 01100111 01110011 00100000 01000110 01110010 01101111 01101101 00100000 01010100 01101000 01100101 00100000 01010000 01101100 01100001 01101110 01100101 01110100 00100000 01000101 01100001 01110010 01110100 01101000 00100000 00100001 00100000