OK. You have a lot of rubbish in the JAD, and possibly in the JAR's MANIFEST too. Don't put anything in there that you don't need.
I've changed "Application.jar" to "application.jar". Please do keep all the file names and URLs lower-case only. It is easy to run into problems if you mix-case.
Can you answer any of the questions I asked earlier:
Is your Sony Ericsson on the same network?
Can you use same SIM card in both phones?
Are they both 3G, and do you have a 3G signal?
Have you tried switching 3G off?
"Connection Lost" does not relate to WML, JAD or httpd.conf problems.
When you're downloading with the JAD, what exactly happens? You should select the link, and then see a page describing the application (name, vendor, version and size), with the option to continue with the download, or abort. Then the download process should proceed.