Connect to database created with IJ - JavaDB

[Walther Mueller]

Hi,
I'm trying to connect to a database that I have created with the JavaDB tool ij.

the database exists and I can work on it, using ij.
However if I try to exit it from source code:

 conn = DriverManager.getConnection("jdbc:derby:"+ dbName
					+ ";create=true");   

I get an Error, saying that maybe an other derby instance has opened the connection already. And than
a lot of Unkonown Soruce errors.
I closed al the existing connections to the db i want to connect to and even closed ij. Still not working.

If I create an new database in java (Just change the dbName variable), everything is working perfectly.

I would appreciate any help,
Regards