Don't overlook Google or Bing etc. to find answers to questions.
see http://www.databasedev.co.uk/convert...de_format.html
From M$oft:
Code:
.accde
This is the file name extension for Office Access 2007 files that are compiled
into an "execute only" file. This format takes the place of the .mde file name
extension that is used in earlier versions of Access.
An .accde file is a "locked-down" version of the original .accdb file. If
the .accdb file contains any Visual Basic for Applications (VBA) code, only the
compiled code is included in the .accde file. As a result, the VBA code cannot be
viewed or modified by the user. Also, users working with .accde files cannot
make design changes to forms or reports. You create .accde files from .accdb files
by doing the following:
1* In Office Access 2007, open the database that you want to save as an .accde file.
2* On the Database Tools tab, in the Database Tools group, click Make ACCDE.
3* In the Save As dialog box, browse to the folder in which you want to save the file,
type a name for the file in the File name box, and then click Save.
More info for you
FMS Splitting database
FMS Performance and Linked Tables
Could you post a jpg of your Relationships window?