I get runtime error 3426

Code:
Private Sub cmd_Add_Click()
dba_user.Recordset.AddNew
End Sub

Private Sub Cmd_Back_Click()
On Error GoTo errrun
dba_user.Recordset.MovePrevious
errrun:
Resume Next
End Sub

Private Sub cmd_Close_Click()
Unload Me
End Sub

Private Sub cmd_Delete_Click()
dba_user.Recordset.Delete
End Sub

Private Sub cmd_next_Click()
On Error GoTo errrun
dba_user.Recordset.MoveNext
Exit Sub
errrun:
Resume Next
End Sub


when I run the program and try to add a record I am getting the Runtime error 3426 action canceled by an associated object. Why am I getting this error and how can I fix it?