When I build my project in Eclipse Helios Service Release 2, I get an error in my web.xml. Please suggest what I have to do for this. In my project I am using DTD 2.2. The error is below.

The content of element type "web-app" must match "(icon?,display- name?,description?,distributable?,context-param*,servlet*,servlet-mapping*,session-config?,mime- mapping*,welcome-file-list?,error-page*,taglib*,resource-ref*,security-constraint*,login-config?,security- role*,env-entry*,ejb-ref*)".

servlets web.xml
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