Trouble with MS Excel values in cells

Hello,
My PC runs on Windows 7 Pro (64-bit Traditional Chinese) and has Office ’10 (32-bit Trad Chinese) and IBM Client Access V6R1M0 (64-bit English).
When using Excel’s data transfer, the values change to 10 or 20 instead of the actual 1 or 2. This occurs randomly. Any thoughts?
Thanks.
