JDBC Sender -Not selecting records

Hi all
I have set up a JDBC sender. The communication channel monitor shows that "Polling interval started" but It is not retrieving data from the JDBC table using a select statement.
This is a sql select statement.
SELECT * FROM table
there is also a corresponding update statement.
clearly ,XI is unable to pick up data from the table.
if i change the name of the table , it does throw an SQL exception that the object doesnt exist. I have also checked with other tables and it is fetching data correctly. The table under problem does contain a row of data in ORacle side.
Why doesnt XI select the records of the table?
Any help will be highly appreciated
thanks
krishna

Hi
yes, the table does contain data
and the sql stmnt is actually
select * from table where flag= 'true' ( i also tried it without the where condition)
here are the other parameters
QOS : Exactly Once
Poll interval: 6
Document name: Resultset
Update sql stmnt : UPDATE TBL SET FLAG = 'FALSE' WHERE FLAG = 'TRUE'
hope this helps
regards
krishna

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