Access slows down after entering 3-5 records

[MarkGibson]

I have a front end/back end Access 2000 db with 5 users, with 16 tables, and approx 450 records in the main table. A single user (all alone, no one else in the office, no other programs open) opens the form which accesses the main table (and links to several of the others; each link is on a different tab). The first record entered is lovely, but by record 3 there is a noticeable slowdown, and by record 5 it is painfully obvious that something is wrong. This is an ethernet network with a switcher, running WinME, on 1.1Mhz P4 machines.

Any suggestions on why this might be happening and what can I do to reduce the impact? It is of course worse when everyone is working on
the network.

Mark