Not connecting with Java Application Server in JEE 5

[Naeem]

I install JEE 5 with Sun Java System Application Server and JDK on
Windows XP. After installation, the default server is started
successfully and I am able to connect to it through URL http://localhost:4848
(or 8080,8181). But once I stop and then restart the server later on,
I am unable to connect to this server using same URL, though server
and domain1 starts successfully. It takes much time and finally the
default page is not displayed. I ve tried reinstalling JEE on
different computers but every time same problem.
Please help.....Thanks