jsp文件无法打开

[SunnieZhong]

jdk-1_5_0_06-windows-i586-p.exe
eclipse-SDK-3.1.2-win32.zip
emf-sdo-runtime-2.0.1.zip
org.objectweb.lomboz_3.0.1.N20050106.zip
jakarta-tomcat-5.5.9.zip
tomcatPluginV31.zip
按要求配置了开发环境

问题：新建的一个Lomboz J2EE Project之后.jsp文件无法打开
显示：An error has occurred..
查看Error log
Problems occurred when invoking code from plug-in: "org.eclipse.jface".
java.lang.NoClassDefFoundError: org/eclipse/jdt/internal/codeassist/ISearchableNameEnvironment
at com.objectlearn.jdt.j2ee.ui.editor.JSPSourceViewerConfiguration.getContentAssistant
.......

[SunnieZhong]

请问有人在吗？帮帮忙啊，谢谢！

[SunnieZhong]

小女是初学者，在线等待。。
请各位过来看看。。。