I am not able to implement the google checkout callback. The error shown is
We encountered an error trying to access your server at http://220.127.116.11/staging1/googlechec...onsehandler.php -- the error we got is: Send failed with code: 401. Response body was: <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <HTML> <HEAD> <TITLE>401 Authorization Required</TITLE> </HEAD> <BODY> <H1>Authorization Required</H1> <P>This server could not verify that you are authorized to access the document requested. Either you supplied the wrong credentials (e.g., bad password), or your browser doesn't understand how to supply the credentials required.</p> <HR /> <ADDRESS> Web Server at grehom.co.uk </ADDRESS> </BODY> </HTML> <!-- - Unfortunately, Microsoft has added a clever new - "feature" to Internet Explorer. If the text of - an error's message is "too small", specifically - less than 512 bytes, Internet Explorer returns - its own error message. You can turn that off, - but it's pretty tricky to find switch called - "smart error messages". That means, of course, - that short error messages are censored by default. - IIS always returns error messages that are long - enough to make Internet Explorer happy. The - workaround is pretty simple: pad the error - message with a big comment like this to push it - over the five hundred and twelve bytes minimum. - Of course, that's exactly what you're reading - right now. -->
Can somebody please guide me how to implement the callback for googlecheckout.
Will I be able to reduce the product quantity as well after the successfull order when the callback is implemented?
Thanks and Regards,