No rows returns through Oracle, but lots through MS SQL with same SQL.

Question

Help. I am running the following statement on the Oracle 9i Database. The db link @scala references a MS SQL database running on a Windows 2003 machine connecting using the hsodbc.exe with HS.
SELECT
'Scala' "System"
,"A"."Emission Period" "EP"
,"A"."Client Contact Num" "Contract"
,sum("A"."Amount") "Scala_VIC"
FROM
"_GL030106_CC"@scala "CC"
INNER JOIN ("_GL030106_VT"@scala "VT"
INNER JOIN "_GL060106"@scala "A"
ON "VT"."Acc Dim" = "A"."Product")
ON "CC"."Acc Dim" = "A"."Client Contact Num"
where
     not "A"."Account" in (N'80000000',N'70500000',N'46110001')
and "A"."Client Contact Num" <> N'100000'
and "A"."Emission Period" <> ''
and "A"."Product" in (N'080',N'088')
and "A"."Emission Period" >= N'0444'
GROUP BY
"A"."Emission Period", "A"."Client Contact Num"
HAVING
sum("A"."Amount") <> 0
ORDER BY
"A"."Emission Period"
,"A"."Client Contact Num"
This runs and returns 0 rows. I can select data from the tables and get lots of data back, so the connection is working fine. If I run the following command on MS SQL I get 115 rows.
SELECT
'Scala' "System"
,"A."Emission Period" "EP"
,"A"."Client Contact Num" "Contract"
,sum("A"."Amount") "Scala_VIC"
FROM
"iScalaDB"."dbo"."_GL030106_CC" "CC"
     INNER JOIN ("iScalaDB"."dbo"."_GL030106_VT" "VT"
     INNER JOIN "iScalaDB"."dbo"."_GL060106" "_GL060103"
          ON "VT"."Acc Dim"="A"."Product")
     ON "CC"."Acc Dim"="A"."Client Contact Num"
WHERE
not "A"."Account" in (N'80000000',N'70500000',N'46110001') /* Take out Stats, Income and Old accounts */
and "A"."Client Contact Num" <> N'100000' /*Ignore NASS Accounts */
and "A"."Emission Period" <> '' /*Ignore blank EPs */
and "A"."Product" in (N'080',N'088') /* Select Scala CCC & CCP Voucher products */
and "A"."Emission Period" >= N'0444'
GROUP BY
"A"."Emission Period"
,"A"."Client Contact Num"
HAVING
sum("A"."Amount") <> 0
ORDER BY
"A"."Emission Period"
,"A"."Client Contact Num"
Is there anything in the SQL that is wrong or is it the HS connectivity that is causing the problem?

Answer 1

I have been trawling around this forum for similar issues and may have posted the original isue in the wrong post.
I have deducted that there is not a solution for this, using MSSQL2005 64bit you cannot get the msdaora to work( cos its 32 bit)
There is an issue with oracle oledb provider (OraOLEDB.Oracle) and ref cursors come on ORACLE get it bleeding sorted
If anyone else out there has been thwarted by the same problem then all I can suggest is that they utilise a production 32bit SQL2005 box and use it as a proxy to oracle with the msdaora if they can.