[SQU] Access denied

All:
When My Proxy server start. But access Internet from Client W/S through the
Proxy, I get error message show below:
could you help me ?
Thanks
ERROR
The requested URL could not be retrieved

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While trying to retrieve the URL: http://www.ricoh-usa.com/
The following error was encountered:
  a.. Access Denied.
  Access control configuration prevents your request from being allowed at
this time. Please contact your service provider if you feel this is
incorrect.
Your cache administrator is webmaster.
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Generated Wed, 27 Dec 2000 20:31:38 GMT by ricohnow (Squid/2.4.DEVEL4)
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