when i activate Web proxy
it's appear with any page i open
ERROR
The requested URL could not be retrieved
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 Tue, 11 Mar 2008 08:46:14 GMT by proxy (squid/2.5.STABLE11)