HT4199 Mac Cinema display interfering with WiFi connection

Year-old MacBook Pro works fine with WiFi UNTIL I plug into my older Mac 21" Cinema display - which I need to do via Rocketfish adaptor, and a female firewire adaptor. Plug in - offline. Unplug - back online.
I have messed with network settings repeatedly, and got things running for a small pocket of time. Restart the day after, back offline.
Note that my older MacBook Pro running Snow Leopard doesn't have this issue - only the new computer, which requires the adaptors to do so.
Any help is greatly appreciated - this is killing productivity!!!

Actually, Niel is half-right. After searching for over a month, and researching all sorts of options that "might" work, I went with the Atlona Dual-DVI to Mini DisplayPort (see link above - discontinued so you'll have to look on Amazon or eBay) and the Apple Nvidia 6800 GT DDL video card (look on eBay for approx. $70-$100).
To achieve full native resolution on the Apple 27" Cinema LED, (2560x1440), you'll have to have both a Dual-DVI to Mini DisplayPort converter/adapter (like the Atlona), IN ADDITION to one of the higher-end "build to order" video cards like the Nvidia 6800 GT DDL or Ultra DDL which can support resolutions greater than the stock 1900x1200 on a single DVI-equipped stock card that came with most PowerMac G5's.
Hope this helps clarify a little for those looking to stretch the lifespan of those bastardized G5's. ;)

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