Tomcat v7.0 stopped to run my project at localhost

Question

I was working on my web application in eclipse with Tomcat v7.0, and everything was fine.
But today suddenly I can\'t run my poject on server anymore.
I do as usual:

Answer 1

Also you can remove these files:

org.eclipse.wst.server.core.prefs
org.eclipse.jst.server.tomcat.core.prefs

from $your_path/workspaceEclipse/.metadata/.plugins/org.eclipse.core.runtime/.settings

and make new server again.