Wifi dont connect on tablet me301t

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http://forum.xda-developers.com – hello i just bought a asus tablet I tested it walked well as wifi also I configured my google account and downloaded some application, but now she wants more now connect to wireless networks, but it detects impossible to try I connected to other networks, it is impossible even to make a connection ..... I do not understand or what is the problem with my tablet ..... Asus Memo pad smart Wi-Fi version V7.5.0.71 version of android 4.1.1 model ME301T. (HowTos)