EFS error: event id: 6203 on Windows Server 2003

From: mika2004 (mika2004_at_discussions.microsoft.com)
Date: 10/29/04 

Date: Thu, 28 Oct 2004 16:03:04 -0700

Has anyone ever seen this eventid from the source EFS.
I get it every time, i klick on an encrypted file.
After that the encrypted files cannot be accessed.
Error: Access denied.
Client OS is Windows XP SP1.
The whole event message is:
EFS does not support encryption over network sessions established using the
NTLM protocol.
Any comments?