我看不到我的wicket项目的任何图像，我只看到图像名称？

I'm building a web project with Wicket, maven and hibernate. I run it with Tomcat 7. I'm actually using a free CSS for the HTML. The thing is that yesterday everything was working fine, and today I start the project as allways and I see that I can't see the images of the web, I just see the images names. I've been searching for the solution for a long time, and it seems that I'm the only one that has this problem :S. I leave a picture so you can see how it looks like the problem and see if you can help me with this... Please help me!I'm building a web project with Wicket, maven a