Access And Vista Problem

Hi, i have a problem with an access database, well 2 problems. first is i don't know much about databases. the second is at work we installed 3 computers in an office with windows vista o/s. they then had a company come in and install software for their business. They were using office 2000 access database on xp previously. The company installing their software copied the access 2000 database to the vista target machines, i believe they may have converted the database to access 2003 version when doing this. The problem is the database doesn't work and they have called us back in to sort out the problem. Well we installed service packs, fixes, patches etc and googled a lot but found no simlar problems or solutions, in short we are stumped. I think the database is compiled into an app or something with switchboard etc, which i think means i can't access it? anyway it opens up with a logon form to get into DB, i enter the username and password and click ok and it gives a message saying:

"the expression on click you entered as the event property setting produced the following error"

it goes on to say there may be problem with an "event,function or macro"

on vista with office 2003 it lists several possible causes which i havent access to right now.

i have now tried it on my own pc with xp pro and office 2007 and it basically gives the same message as above but the list of possible causes is reduced to this one:

"This error occurs when an event has failed to run because Microsoft Office Access cannot evaluate the location of the logic for the event. For example, if the OnOpen property of a form is set to =[Field], this error occurs because Access expects a macro or event name to run when the event is fired"

Can anyone explain or point me in the right direction of where to get a solution. I think this is something for a programmer to solve and possibly something that the original database programmers should be looking at rather than me. am i right?

cheers all!