How to design universe with tables from two databases using a db link?

I am building a universe (v3.1) that has tables from two different oracle db instances. My dba created synonyms for me and there is a database link in place. I don't know how to get this working in Designer. I can see the views under my ID when I browse to insert a table, but there is no structure. I think I have to create a new strategy. I attempted to do that, but the directions aren't very clear to me, and it isn't working. Any help or advice would be greatly appreciated. Thanks!!