Tomato and vlan1

When I can't connect to the internet, I've noticed in the tomato home
page of my Buffalo router that vlan1 is missing. How can I make vlan1
permanent? I don't think my router is talking to my cable modem.

Not being able to connect always happens after turning off my PC. The
only way I can connect is to turn off PC, unplug modem, reset router,
unplug router, plug in modem, plug in router, then turn PC on. I'm tired
of doing that.
Help.

Thanks
area51