linksys wirless not connect internet to mobile or labtop although wirrless network show connected

[ahm1985]

Hi guys
i have linksys wireless router working ok connect internet is good by wire

but when i connect wireless wifi signal come to mobile or laptob and it show connected

but internet not access why this problem happen

problem happen in more computer and mobile suddenly

and last configuration work without any problem

wireless enabled

wirless network mode mixed

wireless chanal 11-2462ghz

what is problem why internet work in wire good

and wireless not work by wifi

please help me isf possible