Problem with 'Mailformed UTF-8 caracter' warning messages when I use Sw

Hi All,
 
I have a problem to avoid "Mailformed UTF-8 caracter" messages when I use
the Switch.pm module on SuSE 9.1 Profesional with english or german language
settings.
I try to set LANG variables in /etc/SuSEConfig/profile and
/etc/sysconfig/language to several language and encoding setting but I can't
avoid these messages. If somebody resoleved this problem, please post the
solution!
 
Thanks,

Lazar Todorov 
Project Manager - Software Development 
hte Aktiengesellschaft - the high throughput experimentation company 
Kurpfalzring 104                       Tel.: +49 (0) 62 21 74 97-173 
69123 Heidelberg, Germany      Fax: +49 (0) 62 21 74 97-134 
 <http://www.hte-company.de/> http://www.hte-company.de<?xml:namespace
prefix = o ns = "urn:schemas-microsoft-com:office:office" />

This message, including attachments, is confidential and may be privileged.
If you are not an intended recipient, please notify the sender, then delete
and destroy the original message and all copies. You should not copy,
forward and/or disclose this message, in whole or in part, without
permission of the sender.