while registering -bad gateway v

What steps will reproduce the problem?
1.
2.
3.

What is the expected output? What do you see instead?

I want to know why while connecting bad-gateway reporting 

What version of the product are you using? On what device / operating
system?
it's just downloded from googleplay so must be latest one

Please provide any additional information below.
i working in Nokia Solution the process attached by Nokia i used & trying to 
connect but it's failing while registering .

Original issue reported on code.google.com by amit.b...@gmail.com on 17 Feb 2015 at 1:04

Sanjivkumarroshan / csipsimple

while registering -bad gateway v #2885