新建工作流连接提示服务器未启动

环境：EAS V7.5
问题：BOS中新建工作流连接，输入地址和端口，刷新数据中心，提示服务器未启动；不知道是指哪个服务器，如果是指管理控制台的话，那肯定是启动了，EAS客户端能正常登录使用！以下为错误日志，请帮忙看一下，谢谢！

eclipse.buildId=I20080617-2000
java.version=1.5.0_15
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=zh_CN
Framework arguments: -product com.kingdee.bos.bim.product.ide
Command-line arguments: -os win32 -ws win32 -arch x86 -product com.kingdee.bos.bim.product.ide

错误
Fri Nov 20 13:52:59 CST 2015
服务器未启动！请检查您所连接的服务器

(type:500) (errorCode:500) com.kingdee.bos.rpc.ce.RPCConnectException: java.io.EOFException
at com.kingdee.bos.rpc.impl.RPCInvoke.createObjectImpl(RPCInvoke.java:761)
at com.kingdee.bos.rpc.impl.RPCSessionImpl.createObject(RPCSessionImpl.java:185)
at com.kingdee.bos.rpc.RPCEngine.createRemoteObject(RPCEngine.java:366)
at com.kingdee.bos.rpc.RPCEngine.createRemoteObject(RPCEngine.java:373)
at com.kingdee.bos.rpcwrapper.RPCEngineWrapper.createObject(RPCEngineWrapper.java:62)
at com.kingdee.bos.workflow.wfdesigner.util.DCUtil.getDCService(DCUtil.java:26)
at com.kingdee.bos.workflow.wfdesigner.util.DCUtil.getDataCenterNameByAlias(DCUtil.java:60)
at com.kingdee.bos.workflow.wfdesigner.editor.WfLoginFormPage.getChangedWfLoginInfo(WfLoginFormPage.java:1117)
at com.kingdee.bos.workflow.wfdesigner.editor.WfLoginEditor.doSave(WfLoginEditor.java:75)
at com.kingdee.bos.workflow.wfdesigner.editor.WfLoginFormPage$LoginCofigSectionPart$3$RefreshDC.run(WfLoginFormPage.java:659)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:446)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:354)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507)
at com.kingdee.bos.workflow.wfdesigner.editor.WfLoginFormPage$LoginCofigSectionPart$3.widgetSelected(WfLoginFormPage.java:678)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:382)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
at org.eclipse.equinox.launcher.Main.main(Main.java:1212)
Caused by: java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2228)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2694)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:761)
at java.io.ObjectInputStream.(ObjectInputStream.java:277)
at com.kingdee.bos.rpc.impl.RPCObjectInputStream.(RPCObjectInputStream.java:8)
at com.kingdee.bos.rpc.impl.RPCInvoke.createObjectImpl(RPCInvoke.java:759)
... 39 more