The equipment is tested properly. You have a problem with the connection to the pool. You need to check the pool address in the settings. With the mining of Ethereum I've never had a problem. On my pool sometimes there are connection issues in the extraction of decred. But after a time, all connectivity is restored. I hope that the Internet works for you?
yes i m using tp-link 823n wifi adapter but speed is very low that's prolly part of your problem, is your trying to use a shitty tp link wifi adapter, ANYTHING WITH LINK IN THE NAME IS CRAP, tp-link, dlink, Linksys. there all shitty and will give you problems mainly with connection. they aren't ment for mining
so true 
