c# - WCF CallBack in Production Environment -

i know going sound stupid - we've spent close 4 weeks trying implement wcf callback system (subscription service), no avail.

can verify have got working in multiple client production environment?

all examples i've come across work on localhost in production fails miserably.

the specific problem subscriptions , un-subscriptions work perfectly, until client closed , re-opened @ point; multiple callbacks made or publish method times out.

again, can confirm have working, or perhaps direct me documentation provides real-world proven example.

background info on existing configuration found here: wcf wcf communication

thanks