请教一个RMI问题！

程序异常信息如下：
D:\java\bin>java MyRMI/DisplayPerfectTime
Exception in thread "main" java.security.AccessControlException: access
java.net.SocketPermission yegf resolve)
        at java.security.AccessControlContext.checkPermission(AccessCon
xt.java:270)
        at java.security.AccessController.checkPermission(AccessControl
401)
        at java.lang.SecurityManager.checkPermission(SecurityManager.ja
        at java.lang.SecurityManager.checkConnect(SecurityManager.java:
        at java.net.InetAddress.getAllByName0(InetAddress.java:909)
        at java.net.InetAddress.getAllByName0(InetAddress.java:890)
        at java.net.InetAddress.getAllByName(InetAddress.java:884)
        at java.net.InetAddress.getByName(InetAddress.java:814)
        at java.net.InetSocketAddress.<init>(InetSocketAddress.java:109
        at java.net.Socket.<init>(Socket.java:118)
        at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(
SocketFactory.java:22)
        at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(
SocketFactory.java:122)
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java
        at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel
)
        at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.ja
        at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:313)
        at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
        at java.rmi.Naming.lookup(Naming.java:83)
        at MyRMI.DisplayPerfectTime.main(DisplayPerfectTime.java:10)