Problems with locale on KDE3

Helo every one. I have problem with locales on KDE3. I have tried everything but doesn't work. I tried to install with the CD I downloaded from pearsoncomputing and don't let me install. I shoud enter on the live CD mode and Install there. Then I select the language Spanish and install as usualy. But when the instalation finished the codification for Windows Drives. and when I run locale the is selected with "POSFIX" and I can't change to es_ES.UTF8 and any other that I use. I hope some body can help me. Your Ing. Luis Manuel Garcés