Is this a split database? That is, does the front end point to
tables in a different MDB? If so, you need to have them in exactly
the same location on the laptop as when connected to the network.
That means they can't be on the network.

In any event, it's a bad idea to replicate forms/reports/etc., as
they are Access objects, and Jet replication works well only with
pure Jet objects (tables/queries).

I have never used briefcase replication as it has always seemed a
poor stepchild to real replication, and not programmable, so I have
no experience with it. But the problem you are having doesn't appear
to me to be specific to the briefcase. Indeed, it doesn't seem like
a replicatoin problem at all. It is more likely that a path to the
server is hardwired into some of the queries. If you look at the SQL
of them you might see that the from clause ends in "IN
'\\server\share\some.mdb'", and if so, that means the query is
hardwired to a server data source, and you won't ever be able to use
it except connected to the LAN that has access to that server.