Split DB, command buttons not working from a Trusted Location

[Danp]

I've got a multi user 2002-2003 access database that was previously split on
a PC with 2002-2003 access, all PC's have been upgraded to access 2007, when
database is split with 2007 the command buttons do not work. Both the front
end MDE file and back end file are stored in trusted locations yet the command
buttons remain non-functional.

 

[Danp]

Hi Ling, I have command buttons throughout the DB, opening forms, running
queries, added & undoing record entries, closings forms, etc.. They all
worked
when the DB was split on a PC that had access 2002-2003 and the last version
of office before 2007, but now that the PC's have been upgraded I'm trying
split and redistribute but can't because the DB is unworkable without the
command buttons. As far as references, the buttons don't even work on my
laptop where the DB is created when I split it. I also unchecked and checked
a reference as suggested (none were missing) and that didn't help either.
Any other suggestions?