[PhantomTa2]

I bought one of these routers a few months back and had problems with it as it kept dropping connection to the modem. So I exchanged it for another of the same model assuming the first was faulty and the second one is doing it, now, too.
Behind the router is fine, all systems can talk to each other and I can ping the router but not, for example, the DNS that my ISP uses. I've tried deleting and recloning the MAC address, which is what Edimax told me to try, (the first time I tried this about a month ago it worked).
Under the internet status it just says "Attain IP Protocol : Dynamic IP disconnect"
Plugging my PC directly into the modem is fine, everything works as it should do. But, after soft-resetting and hard-resetting the router, the problem still persists. The most recent was today, my wife was on her laptop on the internet playing one of her games, then she rebooted her laptop (not touching the modem or the router) and it wouldn't connect to her game or google. I pinged the router and it was good, pinged the DNS server and says "destination net unreachable"
If any one could help with this, I'd be very grateful. I've googled for quite some time but haven't come across an answer as to why it might be doing it or how to sort it out.

*EDIT* I should add that when I log into the router and go to the internet status it just says "Dynamic IP Disconnect" and once the router is between me and the modem, I can't log into the modem admin page, either