Modem Resets and Stops Connecting

Hi,

I don't have anything to show on it, simply because I don't know how, but I have been having this problem for a while now. Every so often, (could be a week, could be a few minutes) my modem will just reset itself, cutting off my internet connection when I'm in the middle of doing something. Then, to make it worse, it won't connect again, the lights stopping and blinking on Send. The only way I can get it to start working again is if I disconnect the coax cable from the splitter that I use to hook up my TV and my modem. The TV works just fine with no interruptions or problems.

My modem is a Motorola SURFboard SB5101, issued from Cox. I connect my modem to a router via an ethernet cable. The router is a Cisco Wireless-G Broadband Router WRT54GS2 V1.

If there is more information you need, please ask.

Thank you!