Apple TV problem after upgrading to iTunes 7.5

PROBLEM: After upgrading to 7.5, Apple TV no longer recognized iTunes and vice versa.
ATTEMPTED SOLUTIONS: Removed and reinstalled iTunes 7.5 from scratch. Reset @TV to Factory Defaults and reconfigured. Removed Apple TV from iTunes Preferences/Apple TV/Remove Apple TV.
iTunes no longer finds @TV, either in the Preferences/Apple TV pane, or in the Device List. Everything worked perfectly before the 7.5 upgrade. All other features and devices working fine. Have reviewed all postings and eliminated the possibility of firewall or port problems.
Suggestions welcome! Thanks.

I have partially resolved the problem. Something with the 7.5 upgrade changed the network protocols being used by the Apple TV... switching to a wired network from end to end with a full shut down and reboot has the @TV back online... I am still working on trying to solve the wireless side of the equation.

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