Sybase no longer maintains the Sybase Central Adaptive Server plug-in.
For Adaptive Server versions 15.7 SP100 and later, use Sybase Control Center for Adaptive Server. Sybase Control Center provides a single, comprehensive, Web-administration console for real-time performance, status, and availability monitoring of large-scale Sybase enterprise servers. For more information, see the Sybase Control Center product documentation at http://sybooks.sybase.com/.