importing dynamic web project in eclipse ?

i use eclipse 3.6.2[Helios] and tomcat 7 and myfaces 1.2.10

i have a problem when i want to import a dynamic web project . i import the project in my workspace and perform the configurations and set jar files but when i run that in tomcat i will have this problem

HTTP Status 404 -

type Status report

message

description The requested resource () is not available.
Apache Tomcat/6.0.33

and in console display this error :

SEVERE: Error starting static Resources
java.lang.IllegalArgumentException: Document base C:\Eclipse\Workspaces\Wsp2\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\Wp1 does not exist or is not a readable directory
    at org.apache.naming.resources.FileDirContext.setDocBase(FileDirContext.java:142)
    at org.apache.catalina.core.StandardContext.re开发者_开发知识库sourcesStart(StandardContext.java:4320)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4489)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
    at org.apache.catalina.core.StandardService.start(StandardService.java:525)
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Oct 13, 2011 4:12:18 AM org.apache.catalina.core.StandardContext start
SEVERE: Error in resourceStart()

what should i do ?

thanx

Eclipse and Tomcat are both in confusion. I'd suggest to clean and rebuild all.

1. Remove project from Tomcat (rightclick Tomcat, Add/Remove project, remove project)
2. Close project in Eclipse (rightclick project, Close)
3. Clean Tomcat (rightclick Tomcat, Clean)
4. Reopen project in Eclipse (rightclick project, Open)
5. Clean project in Eclipse (Project > Clean... > Clean selected projects below, select project)
6. Add project to Tomcat (rightclick Tomcat, Add/Remove projects, add project)
7. Start Tomcat (rightclick Tomcat, Start).