Make sure that the Domino shared libraries directory (for example, C:\Lotus\Domino) is in the Windows system path.
Without this directory in the Windows system path, the JVM might have difficulty locating the Domino shared libraries required by Notes.jar, such as nxlsbe.dll.
If the name of your driver includes spaces, then you must put quotes around the name.
For example, if the driver name is CN=Notes Driver, your notes.ini might look like the following:
ServerTasks=Router,Replica,Update,Amgr,AdminP,maps, ndsrep notesdrv1,ndsrep "Notes Driver"