Rev. proxying a java applet (no replies)

Hi,

I'm a beginner to nginx.

I want to rev. proxying a page with java applet. I think it is usual and nothing special ...

This is my 1st config:

location /pl-wbr/ {
rewrite /pl-wbr/(.*) /$1 break;
proxy_pass http://pl-wbr/;
#proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

The java applet wants to connect to TCP/7000 on the proxied host.
Something has happened but it doesn't work. :-(

I checked the access.log on the proxied Apache host and I couldn't see big differences.
I think it is too general: I don't know any special thing about applet. It is a simple serial
terminal on WEB page.
I used tcpdump to watch the network traffic and no communication on port 7000 on
my client machine.

Any help would be appreciated!

TIA,