有关三层的问题,出现com server warning这个错误

出现一个错误窗口,内容为
There are still active com objects in this application. one or more clients may have references to these objects, so manually closing this application may cause those client appplication(s) to fail.
Are you sure you want to close this application?
在服务端用了TDataSetProvider
在客户端用了TSocketConnection
请高手请教,为什么...