[Windchill] com.infoengine.au.ServiceUnavailableException

Scenario
As I start method server, it throws this kind of exception as bellows. And when I click the Product tab in the windchill, it will produce the same exception:

星期三 5/24/06 14:02:53: Thread-38: Caused by: (com.infoengine.util.IEResource/49) com.infoengine.au.ServiceUnavailableException: "ptcServiceName=com.ptc.ptcnet.albert.server.taskProcessor,dc=albert,dc=ptcnet,dc=ptc,dc=com,cn=Windchill_8.0,cn=Application Services,o=ptc": 無法使用服務。
星期三 5/24/06 14:02:53: Thread-38: at com.infoengine.au.NamingService.getConnection(NamingService.java:952)
星期三 5/24/06 14:02:53: Thread-38: at com.infoengine.procunit.adapter.Adapter.getConnection(Adapter.java:707)
星期三 5/24/06 14:02:53: Thread-38: at com.infoengine.procunit.adapter.Adapter.createConnection(Adapter.java:650)
星期三 5/24/06 14:02:53: Thread-38: at com.infoengine.procunit.adapter.Adapter.(Adapter.java:142)
星期三 5/24/06 14:02:53: Thread-38: at com.infoengine.SAK.Task.executeTaskRemotely(Task.java:1948)
星期三 5/24/06 14:02:53: Thread-38: at com.infoengine.SAK.Task.invoke(Task.java:1665)
星期三 5/24/06 14:02:53: Thread-38: at com.infoengine.SAK.Task.executeTask(Task.java:1851)
星期三 5/24/06 14:02:53: Thread-38: ... 10 more

Solution
Owning to the service which named com.ptc.ptcnet.albert.server.taskProcessor does not exist, so it will produce this kind of exception in the method server console.

Change the value of ptcServiceName of com.ptc.ptcnet.albert.Windchill in LDAP.