problems in creating new cmp entity bean from database

[beanryu]

when I do new CMP bean from database at step 2, it asks me for data source, I select TestDB, which is a network derby server. Then netbeans will pop up the "new database connection" window with all the fields of TestDB filled out, I click ok, then it asks for to "select schema" and I select "app" and click ok, and it saids "error, unable to add connection, connection already exists". Then I click okay which closes the error popup and press cancel that closes the "new database connection" window and now the tables in TestDB are shown in the available tables section. Is this whole thing a bug or did I do something wrong becaues the whole "new database connection" thing seems that it shouldn't be there when I select a data source that I've already added to netbeans. But everytime I click on TestDB for data source, the same thing happens.