I installed CCM 4.2(3) as publisher and subscriber and configured extension mobility as per recommanded method. Issue is when i press service button, i found Extension Mobility service but when i select this service, it gives me error  and i am not prompted for username and pin.I configure everything properly mention on study guides etc.
Please suggest me what should i do.
One thing more, please tell me how can i configure extension mobility service in redundancy mode so when publisher goes down, subscriber take the role.
Now i can access DC Directory but problem is still there. I found one thing, as per mention in the link "http://www.ciscotaccc.com/voice/showcase?case=K93376036" there should be a LoginService virtual directory in IIS but i don't have even i don't have physical directory "C:\CiscoWebs\LoginService\".
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.