Please Help me

Why in Textboxes in Farsi language, cursor move incorrect direction,
in "Regional and Languages Options" from "Control panel" we select our Own
as "Farsi" and country as "Iran" and installed Right-to-Left languages.
In forms we set "Right to Left" as .T. (and Textbox Right to Left Property).
so we cant type correct but when we want to edit a string, THE CURSOR MOVE
INCORRECT!
in Oracle we see this mistake but for it we must set "Regional and Languages
Options" from "Control panel" we select our Own as "Arabic (U.A.E.)"!!!!
for more information you can type a string in Textbox or EditBox and then
from Middle of it, select and mark some characters with pressing Shift+Left
Arrow

My E-Mail:
HeartRefine@HotMail.com
HeartRefine@Yahoo.com

Thank you