E3000 - Accessible Network Devices Cannot Be Seen In List Of Computer

I recently change routers to a Linksys E3000 wireless router from a Uverese 2wire residential gateway and all worked well for a short time nothing changed however when I go to view network devices from Win7,Vista or XP computers the network devices are no longer there. when I shut down and reboot the router and switches I still cannot see these devices, however when I hook up my old 2wire router I see my devices again. Even when I reconnect to the E3000 all the devices can be viewed for a few hours. Changing routers resets something but maybe overloads the linksys E3000 after a few hours? maybe this E3000 is just defective?

When I view a network map in Network & Internet all the devices appear in the map The configuration is Linksys E3000 router with two (2) 8 port Trendnet gigabyte switches and One (1) 8 port Trendnet Poe 10/100 switch. They are chained router to 8 port gig to 8 port gig to 8 port Poe 10/100. Prior to this I had the router to each switch separately - - this does not seem to matter works the same either way

Devices attached - Network printer,XP desktop, Vista Desktop, NAS, WDTVlive media player, Roku, Home automation controller, IP touch screen for the automation, security DVR (wireless devices are all ok Win7 laptop, Vista laptop, Ipad)seldom are more than 3 devices being used at one time light traffic.)