[Building Sakai] How to fix this problem with Tests&Quizzes and Chat tools

[Tin Nguyen]

Dear all,
When I clicked the Tests&Quizzes or Chat link, sakai showed the exception:

org.sakaiproject.portal.api.PortalHandlerException:
java.lang.IllegalArgumentException: Unable to find registered context
for tool with ID sakai.samigo
    at org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:768)
caused by: java.lang.IllegalArgumentException: Unable to find
registered context for tool with ID sakai.samigo
    at org.sakaiproject.tool.impl.ActiveToolComponent$MyActiveTool.forward(ActiveToolComponent.java:497)
    at org.sakaiproject.portal.charon.SkinnableCharonPortal.forwardTool(SkinnableCharonPortal.java:1221)
    at org.sakaiproject.portal.charon.handlers.ToolHandler.doTool(ToolHandler.java:204)
    at org.sakaiproject.portal.charon.handlers.ToolHandler.doGet(ToolHandler.java:96)
    at org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:768)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:646)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
    at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:843)
    at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:679)
    at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1293)
    at java.lang.Thread.run(Thread.java:619)

I tried to clean all (database, tomcat, sakai source). After that I
installed and deployed again, but not effect.
My system is:

   - Tomcat 5.5.31
   - Sakai-src 2.7.1
   - MySQL database 5.1
   - Win 7 Home 64bit
   - JDK 1.6.0_21
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