santhu9730,
Can you answer some questions for me?
1. Are you sending the http request in a separate browser window or in the MyEclipse Web Browser?
The inbuilt tomcat is not a complete tomcat and it can be used only to test the applications internally. So try sending the http://localhost:8080 request in the MyEclipse Web Browser.
Can you try these steps to make sure the inbuilt tomcat is working fine ?
1. Go to MyEclipse >Examples On-Demand.
2. Select a simple project and click on “Install Project”
3. Once installed into workspace, right click and run this project.
Let us know if you come across any issues.