Teamsite Admin GUI Problem

mukul

When I am trying to add the roles to the user from the Admin GUI. I am getting the following error.I have logged in as root.
Can anyone tell me the possible reason.
Teamsite 5.5.2 on Solaris

Error: 500
Location: /iw/tsadmin/editroles
Internal Servlet Error:

com.interwoven.api.access.IWPolicedMixin$OpDeniedException: Operation "removeRole" is not permitted.
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:245)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:220)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:122)
at com.interwoven.api.access.IWAccessorRemoterImpl_Stub.removeRole(Unknown Source)
at com.interwoven.api.access.IWAccessor.removeRole(IWAccessor.java:200)
at com.interwoven.teamsite.admin.EditRolesServlet.doGet(EditRolesServlet.java:121)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at com.interwoven.framework.base.FrameworkServlet.service(FrameworkServlet.java:66)
at com.interwoven.framework.auth.AuthServlet.service(AuthServlet.java:105)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
at org.apache.tomcat.core.Handler.service(Handler.java:287)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:213)
at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:423)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
at java.lang.Thread.run(Thread.java:484)