adding conflict between two users

I have DB(Access 97) where multi- user work in a network.
Today, I encountered this problem.
Two users were in it and do edition and adding a new data on the same
form at the same time.
User 1 was adding data on the form (just say form A) and user 2 was
adding data as well on the same form(A) at the same time.
The problem is that user 2 could see data entered by user 1 on that
form(A) at that moment.
As I know, access handles problems like this by itself. Ex) provide a
warning...

Or something I have to check VB code?

My question?
Are there Adding conflicts in ACCESS 97 (windows XP) between multi-
user in a serve-based environment.

Again,
Two users are adding a new data on the same form at the same time.
Second user can see data, which first user enters on the same form.
Later, user 1 can see corrupted data on the form. The form displays
#Deleted.
how can i handle this?

Please advise.