Parser crashes when using non-ASCII characters in IDs

As I'm from Germany, I wanted to use IDs containing
german umlauts (e.g. ... ID="Einführung").
Shouldn't this work if I use a encoding attribute for the XML file like
'<?xml version="1.0" encoding="ISO-8859-1" ?>' ?
Currently the parser crashes with the following error:

Fatal Error Messages

FatalError: ARP internal error[Line = -1, Column = -1]

Warning Messages

Warning: {W111} Failed to parse XML.[Line = -1, Column = -1]

Parser Loading Error

Exception parsing:
On request I'm glad to provide a small sample RDF file.
Wolf Siberski

Received on Monday, 19 November 2001 07:04:24 UTC