Sybase Central ASE plug-in is no longer included in the Adaptive Server installation image. Use Sybase Control Center 3.2.7 to manage your Adaptive 15.7 ESD#2 servers.
Sybase no longer maintains Sybase Central. However, if required, you can download Sybase Central Plug-ins by going to the http://www.sybase.com/downloads site, then clicking on Maintenance Releases and Bug Fixes (EFBs).