saving file ??

salamz ...i have installed urdu keyboard map in knoppix via remastering and 
i can type urdu .....but when i save the file by giving the file name in 
urdu although it does save the file but when i see the file name only 
squares are shown....ie file name is not displayed in urdu ....can someone 
plz tell me why am i having this problem....also i have installed urdu 
nastalliq font and tahoma and applied it to the system via chosing it from 
control centre ....thank u ...Allah hafiz

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