Try adding entries to the contact list from the Interaction Client. Once you get an entry or 2 in the contact list you should see the format of the ID column, for us they are 22 digits in length. It looks like the first 8 digits are YYYYMMDD and the last 14 must be some sort of unique identifier. In my current contact list the last 5 digits seem to increment from 10000 up by 10,000 at a time (i.e. 10000, 20000, 30000). After you get an example or 2 in the ID column try modifying the ID value a bit to see if you can get some additional entries to show up in the client.