JCO3.0报RFC_ERROR_LOGON_FAILURE的错误

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JCO3.0报RFC_ERROR_LOGON_FAILURE的错误5

各位高手们：
    大家好，我在做JCO3.0，建立JAVA端服务的时候。报JCO_ERROR_LOGON_FAILURE的错误，我在SAP GUI进行登陆的时候，确认用户名和密码是没有问题的，而且也试过6位数字作为密码，进行测试，在服务器上，已经安装过登陆的GUI。可无论怎么测还是报错，解决过此问题或者对此问题有思路的高手们，请不吝赐教,下面是我测试的结果，所用代码为JCO3.0中给的实例：

Exception in thread "main" java.lang.RuntimeException: Unable to create the server TOJCO, because of Unable to get repository
at StatefulServerExample.main(StatefulServerExample.java:221)
Caused by: com.sap.conn.jco.JCoException: (103) JCO_ERROR_LOGON_FAILURE: Unable to get repository
at com.sap.conn.jco.rt.DefaultServer.update(DefaultServer.java:220)
at com.sap.conn.jco.rt.DefaultServer.<init>(DefaultServer.java:118)
at com.sap.conn.jco.rt.DefaultServerManager$DefaultServerFactory.createServer(DefaultServerManager.java:328)
at com.sap.conn.jco.rt.DefaultServerManager.getServer(DefaultServerManager.java:108)
at com.sap.conn.jco.rt.StandaloneServerFactory.update(StandaloneServerFactory.java:362)
at com.sap.conn.jco.rt.StandaloneServerFactory.getServerInstance(StandaloneServerFactory.java:175)
at com.sap.conn.jco.server.JCoServerFactory.getServer(JCoServerFactory.java:74)
at StatefulServerExample.main(StatefulServerExample.java:217)
Caused by: com.sap.conn.jco.JCoException: (103) JCO_ERROR_LOGON_FAILURE: Name or password is incorrect (repeat logon) on ashost sysnr 00
at com.sap.conn.jco.rt.MiddlewareJavaRfc.generateJCoException(MiddlewareJavaRfc.java:677)
at com.sap.conn.jco.rt.MiddlewareJavaRfc$JavaRfcClient.connect(MiddlewareJavaRfc.java:1376)
at com.sap.conn.jco.rt.ClientConnection.connect(ClientConnection.java:736)
at com.sap.conn.jco.rt.RepositoryConnection.connect(RepositoryConnection.java:52)
at com.sap.conn.jco.rt.PoolingFactory.init(PoolingFactory.java:107)
at com.sap.conn.jco.rt.ConnectionManager.createFactory(ConnectionManager.java:316)
at com.sap.conn.jco.rt.DefaultConnectionManager.createFactory(DefaultConnectionManager.java:46)
at com.sap.conn.jco.rt.ConnectionManager.getFactory(ConnectionManager.java:290)
at com.sap.conn.jco.rt.RfcDestination.getSystemID(RfcDestination.java:914)
at com.sap.conn.jco.rt.RepositoryManager.getRepository(RepositoryManager.java:31)
at com.sap.conn.jco.rt.RfcDestination.getRepository(RfcDestination.java:970)
at com.sap.conn.jco.rt.RfcDestination.getRepository(RfcDestination.java:33)
at com.sap.conn.jco.rt.DefaultServer.update(DefaultServer.java:216)
... 7 more
Caused by: RfcException: [null]
    message: Name or password is incorrect (repeat logon) on ashost sysnr 00
    Return code: RFC_SYS_EXCEPTION(3)
    error group: 103
    key: RFC_ERROR_LOGON_FAILURE

at com.sap.conn.rfc.api.RfcApi.RfcOpen(RfcApi.java:196)
at com.sap.conn.jco.rt.MiddlewareJavaRfc$JavaRfcClient.connect(MiddlewareJavaRfc.java:1343)
... 18 more
Caused by: RfcException: [SRD|kgsrmdev]
    message: Name or password is incorrect (repeat logon)
    Return code: RFC_SYS_EXCEPTION(3)
    error group: 104
    key: RFC_ERROR_SYSTEM_FAILURE
Exception raised by SRD|kgsrmdev

at com.sap.conn.rfc.engine.RfcIoOpenCntl.RfcReceive(RfcIoOpenCntl.java:2038)
at com.sap.conn.rfc.api.RfcApi.RfcOpen(RfcApi.java:163)
... 19 more
Caused by: com.sap.conn.rfc.exceptions.RfcGetException: Name or password is incorrect (repeat logon)
at com.sap.conn.rfc.engine.RfcImp.ab_rfcerror(RfcImp.java:1148)
at com.sap.conn.rfc.engine.RfcGet.ab_rfcget(RfcGet.java:120)
at com.sap.conn.rfc.engine.RfcRcv.ab_rfcreceive(RfcRcv.java:33)
at com.sap.conn.rfc.engine.RfcIoOpenCntl.RfcReceive(RfcIoOpenCntl.java:1980)
... 20 more