I know! Actually I found out that with my version 2.03 of XML::Simple only "forcearray" works, as it is case-sensitive to lc! ;-)
But I just solved the problem myself. A missing keyattr (in lower case btw) was it. Using XMLin() with "forcearray => 'node', keyattr => 'node' did the trick!
Anyway, big thanks to the monks of perl. May this thread grow the wisdom in the monastery...