I'm trying to install the audyssey upgrade via the ethernet port and I'm having a hell of a time trying to get the flash program to successfully pass the "communication" check step. I have a linksys router at 192.168.1.1, my PC at 192.168.1.100 and the receiver is showing up at 192.168.1.102. I can ping the receiver fine, but the Denon update program can't "see" the receiver. Anyone else have this problem?