Windows 2000 gives access violation

I have a Delphi 5 program which runs fine under W98, but under identical
conditions in W2000, it gives an access violation (Access violation at
address 004C88D6 in modeul nfib.exe. Read address of 00000008). This is the
first time I've tried to run a Delphi program under W2000. Are there any
issues I should be aware of? (The pgm should not be doing any BDE activities
at the time of the error.) Unfortunately, the W2000 machine is at a
customer's site and I can't debug it there and I have no W2000 system to
test it on.