problem in file transfer

I am working with ejabberd-14.05 and I am working in tranferring file from android to PC, I think I success in finding the proxy beacuse
I have received valid xml from ejabberd which tell me the JID of the file proxy ---- proxy.dodo.com
then I send

then I can't receive anyting, means package reply out.
When I use the two Jabbear clients to transfer file, it work, but I think they also have not received the response from the service, because before they transfer file, they must wait for a long time. I think they may begin the transfer directly.
this is my configuration of the mod_proxy65:
[{host, "proxy.dodo.com"},
{ip, "115.182.77.130"}, {port, 7777},
{hostname, "proxy.dodo.com"}]
could you tell me where is wrong?

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