Wireless Question - Internet by Cable

[Yushin Ahn]

I have Cable Modem connected to my wired router.  7 Lines are connected to the router and 1 line is connected to a wireless router which is configured to work as access point only.

My internet connection gets lost after about 20 minutes.  When I reset the wired router, I get the connection back but lose the connection again after about 20 minutes.

Previouslt when I did not have wireless router, the internet worked fine without interuption.

Do you know what is happening?  Is it because the internet provider changes the IP address constantly and my router does not catch up with it?

Thanks,

 Yushin Ahn