PROPPATCH question (setlastmodified)

Hello,

I am new to this list and I hope it is OK to raise this question here.

Suppose that a WebDAV server accepts the manipulation of "lastmodified"
timestamps, what would the correct XML be?

I tried the following but I haven't found any server that supports it
yet:

<?xml version="1.0" encoding="utf-8"?>
<D:propertyupdate xmlns:D="DAV:">
   <D:set>
     <D:prop>
       <a:getlastmodified>2007-06-09T13-36-32Z</a:getlastmodified>
     </D:prop>
   </D:set>
</D:propertyupdate>

Can anybody help or tell me where to look or ask for help? 
Thanks.

Kind Regards,
Tobias Giesen

Super Flexible Software Ltd. & Co. KG
Lessingstr. 42
48485 Neuenkirchen, Germany
www.superflexible.com
www.tgtools.com

-----------------------------------------------------------
Registered at register court Steinfurt as HRA 5061
Liability / general partner: TGTools Ltd.
Company No. 05513299
Registered in England and Wales
Directors: Tobias Giesen and Claudia Hübl