erro no squid3

uso o linux debian
se vou coloca em anexo o arquivo squid.conf, alguma amigo pode me ajuda ficarei grato.

ERROR
The requested URL could not be retrieved
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While trying to retrieve the URL: /
The following error was encountered:
Invalid URL
Some aspect of the requested URL is incorrect. Possible problems:
Missing or incorrect access protocol (should be `http://'' or similar)
Missing hostname
Illegal double-escape in the URL-Path
Illegal character in hostname; underscores are not allowed
Your cache administrator is webmaster.

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Generated Mon, 02 Jun 2008 11:37:11 GMT by localhost (squid/3.0.PRE5)