Exception with c# code in appium sdk 8.4 xcode 7 and appium 1.4.0

I am using appium 1.4.0
Xcode version 7
I am trying to open simulator with Iphone 5s with iOS 8.2

At this step sometime below exception occur
The Http request to the remote WebDriver server for Url http://localhost:4723/wd/hun/session timeout after 60 seconds

This exception is coming 4 out of 5 times.

driver_Android = new RemoteWebDriver(new Uri(“http://localhost:4723/wd/hub”), capabilities);
and if exception occurs then driver_Android is null.
Sometimes work but sometimes not

I’m having the same issue. My code worked fine before. But after I upgraded to Xcode 7 with iOS 9.1. I have the same problems. The same time out exception occurs after simulator starts. Anyone know how to set the time out? I tried “newCommandTimeout”, but no luck.