Hello,
I am not sure if you already figured this out but just to answer your query:
The applet that was working was compiled prior to distribution so it would basically work since all the components needed are compiled according to how it was coded.
You encounter the Unsatisfied Link Error because the application your created classes cannot locate the methods in the jacspcsc.dll file. This is because the jacspcsc.dll was developed assuming that all the methods that will call it will be placed in the default package (meaning, the java classes are not contained in any particular class), therefore, placing your java classes that calls the methods in the wrapper in a particular package will occur in an error because the wrapper is assumed to be in the default package. If you want your java classes to be placed in a particular package, re-compilation of the jacspcsc.dll is needed. In this case, you need to contact ACS so that their developers could attend to this and give you a library based on your specifications. Another option is to create your own wrapper library for the winscard library.
For further assistance, do contact ACS.