ucwords()?

Hi! I'll try to convert field first char to upper by using ucwords(). Well, this doesn't seem to work correct. Well maybe error came, because that characteres are not standard (they are special characterers, finnish language). Example: $work_text = "perhepäivähoitaja"; $work_text = ucwords (strtolower ($work_text); print $work_name -> PerhepäIväHoitaja). Every char after finnish-ä is upper. How I can correct this error?? gustavus