Hi,
Provided you specified different root namespaces, you should be fine using the two DALs.
By default, the generators creates and uses "Main.ConnectionString" as the app.config key.
So if you didn't personalize that in your projects properties from within the designer, you may have a conflict there.
If you can't afford to regenerate, you can still pass the connection string at instanciation time with your dataacessadapter.
Cheers