Ensure that all jars needed are available to the Server.
You can make your jars visible to the Server by placing them in the adapters/<your_adapter_dir>/lib directory; alternatively you can place some of them in the shared/lib directory, if they are in common to multiple adapters.
The two places are equivalent, because a single classloader is used.
If any jar needed to be loaded at startup, then you would have to modify the Start_LS_as_Application.bat script manually.