Seems I have had this problem before but have been unable to find previous posts which helped me. Nine days ago, we had a lightning storm which briefly (<24 hours) knocked our cable/internet offline. After they came back, TiVo kept getting N33 and/or N13 errors. I tried the unplugging/replugging, restarting system, etc., but still get the N13 error. I am using an Apple Time Capsule and an RCA Digital Broadband router. I don't think that I had any firewall issues before. Seems I might have also fixed the problem last time by hardwiring the G Wireless adapter. Does any of this ring a bell to any of you?