Request Invalid

Hi,

I am trying to invoke GetFolder operation in the response we are getting "The request is invalid."  We are unable to find wht exactly  is invalid in the request . Below are the request and response. Can you please take a look at the request and let me know what is causing the issue.

Request:

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header />
<SOAP-ENV:Body>
<GetFolder
xmlns="http://schemas.microsoft.com/exchange/services/2006/messages"
xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
<FolderShape>
<t:BaseShape>Default</t:BaseShape>
</FolderShape>
<FolderIds>
<t:DistinguishedFolderId Id="inbox" />
</FolderIds>
</GetFolder>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Response:

<?xml version="1.0" encoding="utf-8"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
<s:Body>
<s:Fault>
<faultcode
xmlns:a="http://schemas.microsoft.com/exchange/services/2006/types">a:ErrorInvalidRequest</faultcode>
<faultstring xml:lang="en-US">The request is invalid.</faultstring>
<detail>
<e:ResponseCode
xmlns:e="http://schemas.microsoft.com/exchange/services/2006/errors">ErrorInvalidRequest</e:ResponseCode>
<e:Message
xmlns:e="http://schemas.microsoft.com/exchange/services/2006/errors">The request is invalid.                                  </e:Message>
</detail>
</s:Fault>
</s:Body>
</s:Envelope>