Ordering/Sorting Data In Form

Hi all,
I have a simple 2-table database. the 'parent' table is tblProducts, and the 'child' table is tblDocuments. (one [products] to many [docouments] relationship)

My data entry is done using a 'documents' subform inside a 'products' parent form. The data entry works fine, except i would really like it if my products and documents would be listed in alphabetical order in their respective form/subform {makes it easier on the user, and saves me needing a find record button}. At the moment they seem to be ordered by the time in which they were added to the table. I guess Access is using the primary Key as the 'order by' parameter.

The thing that is infuriating me is that i have gone into my two tables and told access to sort the data by Product Name, and Document name in the respective tables. I can verify that this has worked by going to data view; lo and behold the data are listed in the order i specified.

Further I have gone into my form and sub form properties, into the Data...Order By property and have keyed in the name of the field i want to sort by (product name in the parent form, and document name in the sub form).

I have tried all combinations and permutations of the above processes but nothing seems to work.

It seems i am missing one crucial piece to the puzzle, as i haven't had much luck finding a solution on groups.google or anything else (maybe im using the wrong search terms). I am having this problem with all of my databases, so any help would be appreciated.

Thanks in advance.