Airport Router Problems

can assist me with airport router - airport express 802.11n.

running os x 10.7.3, , other day, accidentally unplugged modem. when plugged in, not access internet, called isp provider , works. reset router, , works to. checked on computer, says connected wireless network, , checked cables plugged in.

problem having now, believe imac using wireless, can't connect ipad, iphone, laptop, droid2 or itouch connect server. when go network preferences on device, shows network, asks password, , says trying obtain ip address, never gets connected.

can please help....thanks....

frustrated........

 

try changing radio channel 9 or 10, don't leave on automatic.
had similar problems airport express , setting radio channel 9 solved them.

using airport utility go airport express -> edit -> advanced -> wi-fi settings -> radio channel. choose 9, save new settings , wait airport express update

 

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