>Before i go into the table that the &fields and &values are coming from, is there any reason why this line would work at 2 locations and not work at another 2 locations - since they're all using the same file of &fields and &values?

There is no reason other than some difference that you must be overlooking. Verify the values of these 2 fields on that machine, and if they reference a table and fields, verify the structure of the table you are referencing.