I have recently installed ubuntu 14.04 alongside windows 7 but I'm having major issues with connecting to wireless networks. The networks are detected and show up in the network manager, but when I connect and insert the correct password (double checked), a window continues to pop up saying that I need to authenticate my password. I've searched for a solution online everywhere and tried everything. One solution worked ONCE, by turning on airplane mode and off again, but I've tried to do this again and it doesn't have the original effect. I use Ubuntu to computer program but do not have a very good knowledge of the technical side of the operating system. Can anybody help?