NETWORKING MYSTERY --please help !!!!!?

i have comcast cable service---i have a emta--a dual modem for phone and internet--it is made by arris---- when i plug the modem into the back of my computer via ethernet cable the internet works good and is fast. when i plug it into my router the wireless signal works great for 2 minutes then the connection dissapears--- i then take out the ethernet cable and plug it into the computer and the internet works great-- i have talked with belkin router company techs and they cannot figure it out either--- i also have another router that is made by d-link and it does the same thing--- does anyone know if the emta modem/phone by arris is not compatible with wireless g rated routers-- or any thoughts on what it could be?? i have done all the usual reset attempts and other stuff with techs on the phone but it just lasts 2 minutes of wireless connectivity then it is gone---help solve this mystery and you are the king of networking !!

NETWORKING MYSTERY --please help !!!!!?
Go into the wireless settings on the router and clone the computer's MAC address. Comcast may be rejecting your computer, thinking it's a rogue on the network.
Reply:try on this..............
Reply:it depends on the distance from the router


it depends on what electronic gadgets are around you.


gadgets like owen etc etc


go to manufacturers website and do a bios update and then do a wireless driver update


check with reseat of the wireless card.


also check if the wireless light keeps swiching between blue and amber
Reply:get another ISP this sounds terrible =(
Reply:that certainly sounds like a low level communication error


sounds like there is a negotiation process and total disagreement between the devices


it's possible that the comcast device either changes the frames on the wire in a propietary manner that makes these routers not


communicable with the types of devices people use to extend their ISP service to a home network ..


if ur router has the option to copy the mac address of your pc that may also help ur cable company may be looking for the mac address of ur pc to always be connecting not the mac of ur router