Notes/Domino 6 and 7 Forum : DBLooup does not show new docs immediatly

I have a document (Form A) with a dialoglist field with the following formula:
@DbLookup("Notes":"NoCache";@DbName;"relations";ww_r_name;2).
This does a lookup in a view "relations" (with "relation"-documents, (Form B)), looking for the value in the field "ww_w_name".
It happens sometimes that I first have to add a new "relations"-document (Form B) to the view "relations", so that I can select it in the dialogist field. So, I have added an form-action to Form A to create a new "relations"-document (form B) in the "relations"-view. In the QuerySave-Event of form B, I added LS-code the update the FT-index of the database, and to refresh the backend-view "relations".
But I have to close the new document (form A) first and to reopen it the get the newly created document (form B) in the dialoglist field.
The property in the dialoglist field "Add Values Not In List" is not an option, bacause the selections in the dialoglist-field should be complete documents, not only names or values.

How can I get the newly created document in the dialoglist field immediatly after creating a document in the view to which the dblookup was performed? I tried the DBLookup options Recache and NoCache.