i start rmid,http and lookup service successfully,however,when i start my service,i got an exception.And i don't know why?any ideas why?the following is error message: 2006-6-9 14:00:53 net.jini.discovery.LookupLocatorDiscovery$LocatorReg tryGetProxy 信息: exception occured during unicast discovery to devilxie:8085 with constraints InvocationConstraints[reqs: {}, prefs: {}] java.net.SocketTimeoutException: Read timed out at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(Unknown Source) at java.io.BufferedInputStream.fill(Unknown Source) at java.io.BufferedInputStream.read1(Unknown Source) at java.io.BufferedInputStream.read(Unknown Source) at java.io.ObjectInputStream$PeekInputStream.read(Unknown Source) at java.io.ObjectInputStream$PeekInputStream.readFully(Unknown Source) at java.io.ObjectInputStream$BlockDataInputStream.readShort(Unknown Source) at java.io.ObjectInputStream.readStreamHeader(Unknown Source) at java.io.ObjectInputStream.<init>(Unknown Source) at com.sun.jini.discovery.DiscoveryV1.doUnicastDiscovery(DiscoveryV1.java:393) at net.jini.discovery.LookupLocatorDiscovery$1.performDiscovery(LookupLocatorDisco very.java:512) at com.sun.jini.discovery.internal.MultiIPDiscovery.getSingleResponse(MultiIPDisco very.java:152) at com.sun.jini.discovery.internal.MultiIPDiscovery.getResponse(MultiIPDiscovery.j ava:83) at net.jini.discovery.LookupLocatorDiscovery$LocatorReg.doUnicastDiscovery(LookupL ocatorDiscovery.java:505) at net.jini.discovery.LookupLocatorDiscovery$LocatorReg.tryGetProxy(LookupLocatorD iscovery.java:474) at net.jini.discovery.LookupLocatorDiscovery.regTryGetProxy(LookupLocatorDiscovery .java:1271) at net.jini.discovery.LookupLocatorDiscovery.access$800(LookupLocatorDiscovery.jav a:308) at net.jini.discovery.LookupLocatorDiscovery$DiscoveryTask.tryOnce(LookupLocatorDi scovery.java:703) at com.sun.jini.thread.RetryTask.run(RetryTask.java:131) at com.sun.jini.thread.TaskManager$TaskThread.run(TaskManager.java:331)