Database Software

Hello eveybody,
Here is my problem.
I started with Arabic as base project.
Then translated the form into english choosing englishing as translation tanguage.
And then build the project with menu command Build translated file.
It generated the new fmb file successfully.
Now I set NLS_LANG to english and compliled it and run.
It is showing still in arbic.
Since it can not recognise arabic character set when I set NLS_LANG to englihs it showed question marks instead of arbic labels.
When I tried to run the form without changing NLS_LANG to english it is showing lables in arabic only.
But reverse is(english to arabic ) is working successfully.
I tried all possibple combinations.
If any other configaration setting need to be changed pls guide me.
Pls can anyboby give me the steps I need to follow particularly in changing the environment befor compilling.

Thanx,
Sreenivas