web app works in sunone but after moving to tomcat it won't

My web application works just fine in sunone studio, but once I move it to tomcat by creating a war file, it wont.

the part of app that doesn't work is the file and directory copy part. everthing else is fine:server access, database connectivity, and login.

if the files and directory are there, it is working, but if they are not there it won't create the directory and copy the file, what it is supposed to do.

one thing I noticed was the browsers status bar:

running it from sunone, it comes up like this:

..//localhost:8080/...

running it from tomcat, it comes up like this:

..//127.0.0.1:8080/

I don't know if that is a clue to a problem.

I am working under window2000 server.

any hint or suggestion would be great.

Thanks,

James

[824 byte] By [701739] at [2007-11-25 10:35:41]