It can take some time for the mining software (I think that you are using BFGMiner as per your previous thread) to establish communications with the pool server. Being on WiFi might be another contributor. You could try a separate utility to make sure that you get a reasonable connection to the pool (I tried WinMtr
http://winmtr.net/, note that you enter just the url, without the port).
It's a good idea to have more than a single pool configured, with fallback to a backup pool if the primary pool has issues (pools have issues, faults, DDOS attacks and natural disasters), so having 'backup' would mean that your mining resources are put to some.
Check with your pool(s) what is the current recommended server address. Some pools modify their settings so the address that you used 6 months ago may no longer be current (recently discovered that Eclipse mining did that, so some of my fallback settings found the pool 'dead').
What is the specific message that you are getting? (a screen image, or text copy can help)
Cheers