HashMap binding dosen't work?

Hello,

 I'm using Spring 2 with Freemarker 2.3.13 and I'm having this problem:

    Language (the class)
       Map<String,String> words = new HashMap<String,String>(); (the property).

    I am able to get the keys, but I can't find any way to get the values.
    I took the example in FM Online Documentation and replaced:
       <#assign h = {"name":"mouse", "price":50}>
    with my hash:
       <#assign h = lang.words/>

    Then using as usual:
        <#assign keys = h?keys>
        <#list keys as key>${key} = ${h[key]}; </#list>

     But I keep receiving this error and I can't solve it.

     Expression lang.words[key] is undefined on line 22, column 23 in
languageDetails.ftl. The problematic instruction: ---------- ==>
${lang.words[key]} [on line 22, column 21 in languageDetails.ftl]
---------- Java backtrace for programmers: ----------
freemarker.core.InvalidReferenceException: Expression lang.words[key]
is undefined on line 22, column 23 in languageDetails.ftl. at
freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
at freemarker.core.Expression.getStringValue(Expression.java:118) at
freemarker.core.Expression.getStringValue(Expression.java:93) at
freemarker.core.DollarVariable.accept(DollarVariable.java:76) at
freemarker.core.Environment.visit(Environment.java:208) at
freemarker.core.MixedContent.accept(MixedContent.java:92) at
freemarker.core.Environment.visit(Environment.java:208) at
freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:167)
at freemarker.core.Environment.visit(Environment.java:415) at
freemarker.core.IteratorBlock.accept(IteratorBlock.java:102) at
freemarker.core.Environment.visit(Environment.java:208) at
freemarker.core.MixedContent.accept(MixedContent.java:92) at
freemarker.core.Environment.visit(Environment.java:208) at
freemarker.core.Environment.process(Environment.java:188) at
freemarker.template.Template.process(Template.java:237) at
org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:344)
at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:280)
at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:225)
at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:174)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:252)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1173)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:901)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
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:174)
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.Http11Processor.process(Http11Processor.java:874)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)

Thank you,
Andrei

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