Acer Aspire 5730-4163 wifi problems

Hi all,
My problem: every few minutes, my wifi connexion resets. This is not a huge problem except that it requires me to restart downloads and disconnects me when playing World of Warcraft. I have an Acer Aspire 5730-4163 with an Atheros AR5B91 wireless interface connected to a Verizon-branded Actiontec MI424WR MoCA router with wifi. I am also running Windows 7 beta 1 (I know, I know...beta OS release). I'm using Avast! (latest version) and Windows firewall. I've acquired Wireshark to sniff packets, but don't know what to look out for. Can someone assist me?

What security are you using on your wireless? Have you tried disabling it to see if it makes any difference? Are there any other wireless networks in range of your and if so is there any channel conflict?

CP