Access 2000 crashing out

I have created a database that has about 7 users. The access program written
in access 2003, but the default file format is Access 2000.

One of the 7 users has Access 2000 installed and has only started to have
the program crashing on her after 14 months of constant use. Nothing has
changed in the program that I can think of.

I have taken other people advice from the site and opened the coding screen
(Alt = F11) and checked the references for MISSING. There is only 5 items
checked but none of the rest have missing on either. Ithen unchecked the
reference apart from two as access said they were in use. I then compiled it
and went back to the form and it worked.

However, when I close it down and reopened the program it crashed when a
button was pressed to open a form. It only seems to happen when a button is
pressed or check box checked.

I hope somebody can ofer me some assistance on this one.

Its got me baffled and our IT section are not willing to support it as they
think we should go out an buy everything.