Multi users and DAO

I am using DAO with an Access 2000 database. One of the tables contains the field "Code", a numeric value. I use the following code to find the first number that is not found in the table (for certain reasons I can't use autonumber, otherwise this would not be a problem)

Code:

---

Dim NewCode as Integer

NewCode = 1

rsContacts.FindFirst "CODE = " & NewCode
Do Until rsLogrosTipos.NoMatch = True
    rsLogrosTipos.FindFirst "CODE = " & NewCode
    If rsLogrosTipos.NoMatch = False Then
        NewCode = NewCode + 1
    End If
Loop

rsContacts.AddNew
rsContacts.Fields("CODE") = NewCode
rsContacts.Update

---

The problem is that when there are 2 users logged in simultaneously and both of them add a record, both records are added with the same Code. I have tried various requery, refresh, etc. methods with no luck.

Any help would be appreciated.

Thank you,

Andrew

Never mind! Found the answer.