plz help me out i ve problem in the site www.stockholding.com

the main page appear but if i click to login button on the main page
the error appear as below.

ERROR
The requested URL could not be retrieved

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While trying to retrieve the URL: http://www.stockholding.com/panalert.html

The following error was encountered:

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 root@localhost.



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Generated Fri, 01 Feb 2008 09:39:47 GMT by box.salarpuria.biz (squid/
2.5.STABLE6)


AndISP line is connected to the firewall,
through firewall n to the server.


What should i do for this error