Farsi Characters are Not Displaying Correctly in PDF File

Hello,

We are using oracle application server to run reports that uses Farsi characters.

In forms the characters are displayed correctly. When I print reports into RTF or HTML format.  they are displayed correctly. but in the PDF reports, Farsi characters are not linked to other characters.

Do you have any idea how to resolve this problem ?

Thank you.

Here is my environement : 

Midleware : Oracle Application server 10.1.2.3 

Database : Oracle DB 11g.

NLS_LANG = Arabic_America.AR8MSWIN1256

 

uifont.ali 

......

[ PDF:Subset ]

Arial..italic.Bold.. = "arialbi.ttf" 

Arial..italic... = "ariali.ttf" 

Arial...Bold.. = "arialbd.ttf" 

Arial = "arial.ttf" 

"Andale Duospace WT J" = "Aduoj.ttf"