Khmer Software Initiative

Hi there, i have a problem with typing khmerOS font by using Openoffice.org V.2.0 i can not type word orderly--the vowel or consonent posision is not where it suppose to be. But i can, using the same compouter and OS, type the word correctly with the same font in Ms.Office 2003. So, in order to use OpenOffice.org, Do i need any further configuration or system file or software? Hopefully, Phearun