Error Retrieving Numeric Data From Oracle 10g On 64 Bit Itanium SSIS Server

I am working on a project to write SSIS packages to update a SQL Server 2005 database with data from an Oracle 10g database. Unfortunately, our development ETL box is running 32 bit Windows Server 2003 while the production ETL box is running 64 bit Itanium Windows Server 2003. We have created SQL Server Agent jobs to execute all of our packages. All of our jobs run without error on the 32 bit development box, but in our preproduction tests they are failing in the 64 bit box.

In my testing, I've found that I can successfully pull character data from Oracle. For example, I can write a package that retrieves the data for the following query:

SELECT 'test' FROM dual

However, the following fails:

SELECT 1 FROM dual

I have logging turned on in my package. When the package fails, I typically see informational messages in the log up to the point of failure, but no actual error event logs are generated. The only error information I have is in the SQL Server Agent job history log, which contains the following:

Executed as user: SERVERNAMESYSTEM. The return value was unknown. The process exit code was
-2147483646. The step failed.

I have also tried using the 64 bit version of the DTS Wizard to create a sample package, and observe the same behavior. When I run the DTS Wizard, queries that return numeric data cause DTSWizard.exe to exit and produce the following message in the application event log:

Event
Type: Error
Event
Source: .NET Runtime 2.0 Error Reporting
Event
Category: None
Event
ID: 1000
Date:
2/1/2007
Time:
12:36:13 PM
User:
N/A
Computer: SERVERNAME
Description:
Faulting
application dtswizard.exe, version 9.0.2047.0, stamp 443f5e50, faulting module
oracore10.dll, version 10.2.0.1, stamp 435841b0, debug? 0, fault address
0x00000000001e4910.Has anyone else experienced similar behavior, and know of a solution aside of wrapping all retrieval of numeric data in to_chars in our Oracle queries?