WEBI report not displaying arabic

Hi,

I have a webi  report which consists of multilingual languages (English & Arabic)

Data base is Oracle 10G , data consists of arabic language.

BO version is SAP BI 4.1

While refreshing the report ,i am getting junk characters for the arabic data as below.

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Could someone help me resolve this issue or what activity should be performed on the server to display the arabic language coming from oracle DB?

Please note that this a new implementation

Regds,

Samson