Netgear WN111v2 installation problem

with

$ nmcli d wifi list

i can see the available WiFi hotspots

but the connection command

$ nmcli d wifi connect WiFiSSID password WiFiPassword iface WifiInterface

gives me

$ connection activation failed: secrets were required but not provided

didnt found anything helpful for this error

See with 'lsusb' whether the chipset is really AR9170.

for the record: if signal strengh is to weak, strange errors can occur. now i have a better signal but connection still drops from time to time. strangely the connection disappears in trisquel so i have to disable and re-enable wi-fi to get connected again, maybe, otherwise i have to restart. even more strangely is that I connect to a range extender which should give a solid connection.