Problem: "???" in place of string result

Hi!
I would like to use Oracle STRUCTS but after .getObject the .getAttributes method gives me only three question marks: "???" in place of the real varchar/String.
BEA WebLogic's package examples.jdbc.oracle.extensions contains a simple example to demonstrate how to use Oracle STRUCTS. Everithing works well in this example but in place of string results there are triple question marks: "???".
Here is the OUTPUT of the STRUCTs client sample execution:
G:\bea\weblogic81\samples\server\examples\src\extensions> ant run.structs
Buildfile: build.xml
run.structs:
[java] Getting employees from database...
[java] Employee#: 100
[java] Name: Alfred Chuang
[java] Address: ???
[java] ???, ???
[java] Employee#: 101
[java] Name: Joe Walker
[java] Address: ???
[java] ???, ???
[java] Employee#: 102
[java] Name: Tina Potter
[java] Address: ???
[java] ???, ???
[java] Employee#: 103
[java] Name: Fred Couples
[java] Address: ???
[java] ???, ???
[java] Inserting employee to database...
[java] Getting employees from database...
[java] Employee#: 100
[java] Name: Alfred Chuang
[java] Address: ???
[java] ???, ???
[java] Employee#: 101
[java] Name: Joe Walker
[java] Address: ???
[java] ???, ???
[java] Employee#: 102
[java] Name: Tina Potter
[java] Address: ???
[java] ???, ???
[java] Employee#: 103
[java] Name: Fred Couples
[java] Address: ???
[java] ???, ???
[java] Employee#: 105
[java] Name: David David
[java] Address: ???
[java] ???, ???
BUILD SUCCESSFUL
Can anybody help me?
Thank you very much.

Sorry i made a mistake in my query
SELECT SUPPLIER_ID || '-' 
FROM SUPPLIER 
WHERE SUPPLIER_CODE IN (SELECT SUPPLIER_CODE 
FROM SUPPLIER_ACCOUNT 
WHERE SUPPLIER_CODE IN ('5771','5790','6436','8389','416') 
AND COUNTRY_ID = 205 
AND ACCOUNT_NUMBER='891274') 
AND COUNTRY_ID = 205; 
Usually I get the results as 
5678- 
5789- 
till dec 2006 But suddenly from Jan 2007 the order of the result is changed to 
5789- 
5678-. 
There is also no change in data. 
Can plz help me why the order changes? 
Thanks for advace help

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