ATV2 dropping itunes & rebooting?

I'm running TV2 via wireless g (netgear router) connected to itunes on a winXP machine. The problem happens when I leave the TV running for a couple of hours before with nothing playing. If I then try to play a song from my itunes library via the TV it appears to freeze up once I choose the song (black screen). If I check itunes on the computer, the TV still appears in the device list and I can alter he settings. A few minutes later the TV spontaneously reboots, then asks for language preference and give option for a restart. After the restart all seems to be working again.

I've turned OFF my firewall in winXP for the last day or so, have added the TV ip address to he router's safe list, and have even tried manually assigning the TV a fixed ip address. Nothing seems to work. I'm going to try hooking it up via wired ethernet next but need to run a new cable from the router first. My computer does NOT go into any kind of sleep mode of hibernation, btw.

Any ideas?
thanks

One thing I forgot to mention is that my music is NOT synced to the ATV. Also, I'm thinking about getting a wireless N router to replace my G one since my laptop supports that speed anyway. Maybe it will help the dropping problem too as a bonus.

ipedro, thanks for the reply. Are you running itunes on a pc or mac? Is your ATV connected wirelessly?

I'm hooked to a sony SXRD via HDMI. I don't get any signal warnings on the set when the screensaver comes up or when I put the ATV in sleep mode. I'll try hooking up via component for a day or two and see if there is any change.

I ended up using wired ethernet instead of wireless and no problems since. Fingers crossed.