Jason,

Thank you for your reply. You are correct and I just have to set up key before accessing data.

(1) Set up DatabaseSetKey, follow MM help.

(2) added a default DatabaseSetKey to my 1st database in app.vb
mmAppBase.DatabaseMgr.DatabaseSetKey = "BIData"

(3) before filling my dataset from my 2nd database, in the biz object
OakLeaf.MM.Main.mmAppBase.DatabaseMgr.DatabaseSetKey = "Solomon"

Thanks,
Sheldon