I 've recently deployed one of my projects on weblogic  10.3 which was running on weblogic 8.1. I changed nothing in my code and deployment descriptors. I tested it and the system working properly. If you don't get any error in logs it 's propable that you should start your App using console.

Please send the error logs and exceptions, you can find the answer there,

well, i don't know where the problem is , but when i deploy my project and run  my weblogic  my browser  couldn't find the project and it reports error 404 for this project .
of course i work with my eclipse and for running a project it has 3 option for setting
compiler of the project and jre for project and jdk for weblogic but i set them correctly but it is not working.