Another Newbie Networking Question..

Ok so here's my setup:
Comcast Cable modem--->Vonage Router--->AirPort

I have my Mac connected wirelessly with no problems except for a few annoyances:
1. My signal fades and I am constantly restarting the AirPort.
2. When I boot up, a browser window opens with no problems but then I get the error message that says None of my Trusted Networks can be found would I like to join [the name I use for my network]. Seems like a remedy for this one would be to set [my network] as my Trusted Network, but I can't see where in the settings I could accomplish this.

You guys have been so helpful in the past, I'm counting on you again for this one!!