502 Bad Gateway error on client when i host my WCF service to the IIS 7.

Hello
When i call wcf service locally, it works fine.
when i call my wcf service hositing it on IIS i get error 502. It happens exactly after 90 secs. So i thing it is some timeout issue...

I tried to change following setting on IIS on mywebsite and default website settings.
In website - connectiontimeout - set to 600 instead of 120
in application pool Ping maximum respond time - 600 instead of 90, ShoutDownTimeLimit = 600 instead of 90 and start uptime limit, instead of 90


I consume WCF through win 8 app client, setting are following:
           
            client.Endpoint.Binding.ReceiveTimeout = new TimeSpan(0, 3, 0);
            client.Endpoint.Binding.CloseTimeout = new TimeSpan(0, 3, 0);
            client.Endpoint.Binding.OpenTimeout = new TimeSpan(0, 3, 0);
            client.Endpoint.Binding.SendTimeout = new TimeSpan(1, 0, 0);
As i said, it works locally

WCF works through http

What else it can be?