I dont have any problem with my Netgear DIR-615...
Have you tried re-setting the router and also checked that the SSID is not hidden in the settings? Do you have enough IP addresses available for the number of devices connected to the router, i know you can specify a range of addresses and once they were used up it might cause an issue?
Have you tried turning off the WiFi on the scroll, rebooting it and turning it back on?
Sorry for all the random questions, am just thinking out loud the things i would try.





