Data Validation Defined Names

I have attached what, as far as I can figure out is two identical workbooks. Both have the same defined names (Instruments, Analysts, Products) on a sheet called Lists. In both, I tried to use those defined names on the other sheet for Data Validation. In one workbook (2008A), it worked. In the second, it didn't. Any explainations? I've tried renaming, clearing, etc but can't get the second one to work with the data validation.

Thanks
ChemistB