Error while accessing UWL item

Hi

I have configured ESS/MSS..... When an employee raises a leave request, the manager gets the Leave request for approval in UWL...but when i select the UWL item to open,i get the following error;

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501 Not Implemented

SAP J2EE Engine/7.00

Method ïPOST is not defined in RFC 2068 and is not supported by the Servlet API

Details: No details available

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Following one of the threads in SDn, i decatiavted "use HTTP 1.1" in Tools- >Internet Options-> Advanced settings- > HTTP settings ..but still the error presists..

Any idea why i get this error and how to solve it?

Cheers

Sangeetha J