Visibroker error

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I have recently installed Visibroker for Java 4.5 on Windows NT. I am using JDK 1.2.2. I am able to start the smartagent and the Console...but when I try to start the gatekeeper I get the following error...

java.lang.VerifyError: Class org/omg/PortableServer/AdapterActivatorPOA override
s final method _set_delegate.(Lorg/omg/PortableServer/portable/DelegateV
at com.inprise.vbroker.poa.AdapterManager.vbRootPOA(AdapterManager.java:
110)
at com.inprise.vbroker.poa.AdapterManager$2.resolve(AdapterManager.java:
276)
at com.inprise.vbroker.interceptor.InterceptorManagerImpl$ServiceManager
.resolve(InterceptorManagerImpl.java:87)
at com.inprise.vbroker.orb.ORB.resolve_initial_references(ORB.java, Comp
iled Code)
at com.inprise.vbroker.gatekeeper.GateKeeper.start(GateKeeper.java:92)
at com.inprise.vbroker.gatekeeper.GateKeeper.start(GateKeeper.java, Comp
iled Code)
at com.inprise.vbroker.gatekeeper.GateKeeper.main(GateKeeper.java, Compi
led Code)

and if I try to run the vbj command I get the following error:

org.omg.CORBA.BAD_INV_ORDER: The Servant has not been associated with an ORBinst
ance minor code: 0 completed: No
at org.omg.PortableServer.Servant._get_delegate(Servant.java:21)
at com.inprise.vbroker.poa.POAImpl.set_servant_delegate(POAImpl.java:219
6)
at com.inprise.vbroker.poa.POAImpl.activate(POAImpl.java, Compiled Code)

at com.inprise.vbroker.poa.POAImpl.activate_object_with_id(POAImpl.java:
1303)
at Server.main(Server.java:25)

Can anyone help me out and tell me whats going on? Thanks in advance.

Thanks in advance,
Jacob.