Margit

It sounds like the front-end (the piece you moved from another computer) is
using linked tables (the tables of data are elsewhere, not in the copy).

But it also sounds like the way the tables were linked was using a network
"share" (like the N: drive, or the P: drive or the Z: drive).  You can
discover this by opening the database, clicking on Tools | Database... |
Linked Table Manager and looking at how the tables are linked (in
parentheses).

Here's a likely possibility ... your PC does NOT have the same share as the
old one.  Either map a share with the identical drive letter (e.g., N:, P:,
Z:, ...), or re-link to the tables, whereever they are on the LAN, using a
UNC naming convention (e.g., \\servername\path\file).  You might need to
look up how to use UNC...

Good luck!

Regards

Jeff Boyce
Microsoft Office/Access MVP