delphi fro .net 开发人员指南29章 remoting 客户端编译error(33分)

procedure TWinForm2.TWinForm2_Load(sender: System.Object; e: System.EventArgs);
begin
fChannel := HttpChannel.Create();
ChannelServices.RegisterChannel(fChannel);
//error出现的位置
fBankManager := Activator.GetObject(
typeof(IBankManager),
'http://localhost:8099/BankManager.soap');
end;
编译错误信息
[Pascal Error] ClientForm.pas(366): E2010 Incompatible types: 'IBankManager' and 'Object'
[Pascal Fatal Error] BankClient.dpr(17): F2063 Could not compile used unit 'ClientForm.pas'

帮看看是何原因

放弃在.net下开发，结帖