Having to reboot my router all the time?

I have a d-link DIR-615. with network magic paid subscription. I have to keep rebooting it twice a day it seems. Im on cox cable in Las Vegas. Any ideas what i need to do. By the way this is my 5th router i have tried. I have tried 2 netgear , belkin, and linksys..this one is the only one that seems to work half way decent.

thanks in advance

 

If you use heavy p2p, then that the way it is.

Otherwise, if it works well when you are connected directly with a computer to the modem then you might need a new Router.