Well, you could try putting the query and data fields for the secondary data connection on the form some place. Add a button that executes the query. Then you can test and see if it has to do with the value you are passing into the query field - for example, do you need to remove the claims prefix? Of course, it could also be that the issue is on the server side, and nothing you do in the query will help. That is why I suggest getting info from the logs.
Hilary Stoupa
