Connection Problem Webdav W8.1

Hello,

I followed the discription to include a KM Folder as a Webfolder in Windows Explorer.

http://help.sap.com/saphelp_tm81/helpdata/en/30/75b62c659d724fb908c74ade23af51/content.htm?frameset=/en/4e/05f44941f4bd4890c9e54015810800/frameset.htm&current_toc=/en/24/013f420e09b26be10000000a155106/plain.htm&node_id=73&show_children=falseHello,

I always get a message that the order is not valid. However if I connect with Portal Drive or Internet Explorer to the Wedav Directory it works fine.

I have already searched MS and SAP Forums, set BasicAuthlevel to 3 and checked if Web Client is running!

Thanks for any help !