Getting disconnected with Lynksys router

[LDH]

I have a linksys wireless access point with the 4 port hub. I am using a cable modem modem that plugs into the linksys, and then all my pc's plug into the linksys. Most of the time I have no problems, but it seems about once a day or so I get disconnected from the internet, even though the cable modem shows that it is still connected. I was using ICS before i got the linksys, and I never had this problem, so I dont think it is the cable modem or their network. The only way to get back on is to unplug the linksys and let it re-start itself. Has anyone else came across this problem, or have a suggestion for me. You can e-mail me at ldh@houston.rr.com Thank you.