Oracle Reports 10.1.2.3 output shows question marks, parameter form shows correct Arabic

Question

Hi
Following is our environment
Oracle Application Server     10.1.2.3.0
Microsoft Windows 2003 Enterprise Edition Service Pack 2
Oracle Database 11.2.0.2.0
NLS_LANG     AMERICAN_AMERICA.AR8MSWIN1256
When client runs the report on browser (IE), the parameter form appears fine with Arabic characters.
Inserting the parameters in Arabic also look fine and characters display in Arabic but when report is generated, the output shows the inserted parameters as ????
On server, regional settings are ALL Arabic. Also the registry has NLS_LANG setting of AMERICAN_AMERICA.AR8MSWIN1256.
Report output is same for both html and pdf formats. For PDF subetting, uifont.ali file has been modified but the issue does not seem to be PDF related since the html format reports also shows ???
It is a 3 tier setup hence there is no question of having NLS_LANG registry settings for client PCs that are running Windows OS with Arabic regional settings that match the server.
Interestingly, the same report when run from a different application server having same architecture runs fine. The other application server has exact same version of OAS. Database supports Arabic and is configured as such.I tried comparing the different configuration files on both servers but apparently I cannot find the place where I should change something for the reports to show correct Arabic.
SELECT * FROM NLS_PARAMETERS
WHERE parameter IN ('NLS_CHARACTERSET','NLS_LANGUAGE');
NLS_LANGUAGE
AMERICAN
NLS_CHARACTERSET
AR8MSWIN1256
I am writing this after doing quite some research but seems like I am unable to find a solution to this.
Any help will be appreciated.

Answer 1

Thank you Paul for your reply.
I think you misunderstood me. I understand that it is all volunteer work and I never said I was looking for "quick" or "sure" response. I did not even use the words IMMEDIATE or URGENT in my post. I found it strange because I personally believe that there are many volunteers providing great support to others and yet my post somehow went unnoticed. In my personal opinion, however, if you do not wish to reply then you should just ignore rather than being rude. No one can force anyone to do the good work that people are doing here at oracle forums and they are all doing this out of choice. Let me also assure you that me and people like myself really appreciate their efforts.
Having said that, I wish you had taken time to read about my issue. There is infact a registry setting that specifies the NLS_LANG and it is already set under both Infrastructure and Middle Tier in the registry. I mentioned it earlier. The value is AMERICAN_AMERICA.AR8MSWIN1256 and I believe this is correct for Arabic characters.
What is confusing for me is the fact that if browser was not capable of showing Arabic characters then the static Arabic words in the reports layout (field name for instance) would also show as garbage or question marks. They appear to be fine. Since we are just passing some parameters in Arabic language and not saving anything in the database, the DB characterset does not come into play for now. Although the DB characterset is also set to store Arabic data. We are displaying the parameters that we are passing through the parameter form in the output of the report and this is where we see question marks (????).
Finally, if it was a browser issue or a DB characterset issue, then in my limited knowledge, I believe that the report that we are running using the other Application Server that is pointing to the same database should also show the same behaviour. That is not the case as it displays the same report perfectly. Client machine is the same in both cases using Windows 7 and IE as browser.
http://appserver1/reports/rwservlet?admin/myreport           (connecting to db1)    works fine
http://appserver2/reports/rwservlet?admin/myreport          (connecting to db1)     show question marks
Above URLs are examples. The point I am trying to make here is that the issue has to be with the new application server and it cannot be registry settings as I have double checked the entry and it exists in all Oracle Homes ie Infrastructure and Middle Tier. So maybe it is some configuration file setting that I am missing here.
Any help will be appreciated.