Problems creating an XML Port

Hi, I am trying to use an XML Port on a self created table but it always fails. Steps that I 've done: 1. Create a new XML Port 2. Create a text node “Employees” 3. Create a node “Employee” and set it as “TABLE” with the value “logTable (50000)” 4. Create a node “Id” and set it as field. When I then try to select a field I always receive the following error: “The field does not exist. => Identification fields and values: No.=‘15’” I 've seen that the same error (sometimes with another number) is being showed with other tables like: Country (9). But for the employee table (5200) this works fine. Do I need to set some properties to my table to fix this or does anybody know how to fix this ? Thanx in advance, Geert