[squid-users] Squid error Zero Sized Reply

Does anyone know how I can resolve this error message:

ERROR

The requested URL could not be retrieved

While trying to retrieve the URL:
http://eudract.eudra.org/eudracts/uploadXML.do?

The following error was encountered:

        * Zero Sized Reply
Squid did not receive any data for this request.

Your cache administrator is webmaster

Generated Mon, 13 Aug 2007 13:01:36 GMT by MHRA_Webcache
(Squid/2.6.STABLE2)

This email and any files transmitted with it are confidential. If you are not the intended recipient, any reading, printing, storage, disclosure, copying or any other action taken in respect of this email is prohibited and may be unlawful.

If you are not the intended recipient, please notify the sender immediately by using the reply function and then permanently delete what you have received.Incoming and outgoing email messages are routinely monitored for compliance with the Department of Healths policy on the use of electronic communications.

For more information on the Department of Healths email policy, click http://www.dh.gov.uk/DHTermsAndConditions/fs/en?CONTENT_ID=4110945&chk=x1C3Zw

The original of this email was scanned for viruses by the Government Secure Intranet Anti-Virus service supplied by Cable&Wireless in partnership with MessageLabs. (CCTM Certificate Number 2006/04/0007.) On leaving the GSi this email was certified virus free.
Communications via the GSi may be automatically logged, monitored and/or recorded for legal purposes.
Received on Tue Aug 14 2007 - 01:40:01 MDT