As far as Double Bytes CJK encodings are concerned,  German "Umlaute" Ä (ae), Ö (oe), Ü (ue)are part of Asian characters as well. Therefore NJStar Communicator can not tell them apart. To have Umlaute displayed correctly, you need to temporarily switch NJStar Communicator viewer to "Ascii/No CJK Support".

There will be no prblem if the application uses Unicode instead of DBCS.