Empathy longstanding issue behind proxy

There is a longstanding issue of empathy (or telepathy-gabble) behind proxy.
I have tried to get solutions for years. Here is the description:
Settings:
* I am behind a proxy.
* I have set the system proxy settings and http_proxy/socks_proxy in the environment.
* The latest version of empathy (3.12.1)
Issue:
I use empathy to login GTalk account. The authentication worked fine. However, there is
an error "Network error" showing in the dialog. This happened before displaying
my contacts. I googled this issue and found that something wrong with telepathy-gabble.
So, I abandoned empathy for a long time.
But, recently, I use a newly registered google account to login GTalk with empathy.
Everything is well. I can chat with others. Still, I cannot login with my old account.
This seems wired. I asked others to try their accounts, some of them can login without problem
and some still have problem.
For years, I can only use GMail in the browser to access my gtalk. I know this is about
empathy rather than Arch Linux. But, I like this community and believe someone could help me.

Hello Enrique,
I fully agree - but unfortunately there is not much choice regarding the network layout. Or at least I cannot influence it ;-P
The problem seems to be a bit mor subtle than I thought at first. I already have configured both Web Start and the browser to use the proxy. However, the error message clearly indicates that the integration builder (IB) doesn't use the configured port of the proxy to connect to the web application server, but another port.
Our server listens on port 50000. The error message tells me that the IB tries to connect using port 50004. Obviousely it tries to open a direct socket to the server - probably an extra connection to exchange commands etc (RMI? CORBA? WebServices?). This is not possible in our network configuration.
The question ist whether I can somehow influence this port to make a connection using this proxy possible...
Regards, Joerg

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Now look here. I could not care less about this
code. I don't know anything about it, I don't
want to know, I have already recommended you don't
use it, and I have also given you a simpler and
better solution. If you don't want to take my advice
that is your privilege and your problem.ya i has understand system propertis i have setted and u can see it in the code i have tried by both system properties and also J2SE 5.0 proxy class but i got a same problem malformed Exception server refuse to connection.
is there any problem at sever side?
can u tell me in which way u r teling to set the propery i m looking forward for ur reply.
ya i m sure u will give me.................reply "ejp".
Thnx in advance.

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