All the above solutions didn't worked for me. AdminUI.log in Client PC where I am installing Admin console gives errors of Version mismatch. I am installing Admin Console from SCCM CD.
This worked for me:
1. Uninstalled Admin Console from Client PC
2. Copied AdminConsole.msi file from my SCCM server PC \\SCCM_PC\SMS_Site\Tools and then installed Admin console from this file
3. And Guess, I am able to connect to SCCM site from Client PC