File transfer EXTREMELY slow over wireless connection

Hi there,
I have recently been transfering some files from my TiVo to my iMac via a wireless connection. I don't know if the files are going through my router first, and then coming to my iMac or what, but the transfer rate is really slow; about 50 - 100 KBps. That's Bytes, not bits. I know that 802.11g is 54 mbps, which translates to about 7 MBps, but I'm getting about 1/70th that speed.
I recently moved my computer to a part of my house that has better wireless reception. I have an AirPort extreme card that is 802.11g compatible, an 802.11g Linksys wireless router, and a D-Link 802.11g wireless USB adapter hooked up to my TiVo. 2 dashboard widgets that I have tell me that the connection strength to my iMac is excellent (>75%), and that the speed is full (54 mbps). My iMac discovered the TiVo with the "Bonjour" technology built into Mac OS X. It doesn't make any sense to me. Even if the files are going through the router, everything is operating at 7 MBps, so why am i getting 50-100 MBps? Any help is appreciated!
Thanks,
Trevor

Here's what I did:
I moved my computer to a place where I could connect to my wireless router through an ethernet cable. I tried to transfer files from the TiVo again using the same application, and the download speed was no faster. I tried having both Airport and Ethernet on, and it was slower. I tried just Airport, and it was no faster than before. So I found a new way to download the shows using Safari and Bonjour. I tried, and it was downloading at (according to the downloads window)... 0B/s. I thought "Great". I can't even download it at all this way. So in desparation, I moved my computer right next to the USB device that the signal is coming from, and I get the same download speeds using the application. I try with Safari, and this time it actually starts downloading faster than 0B/s. The top speed I've seen it at is what it's hovering at right now: 129 KB/s. Now here comes the interesting part:
My internet connection (loading webpages with Safari) was lightning quick everywhere my computer was. That indicates that the issue is with the USB device on the TiVo, and not my router or mac. I looked for an ethernet pot in the back of my TiVo, but I could not find one. I found a phone jack (for connecting to the TiVo service via the phone), and my iMac has a phone jack too, but then I realized that the application I was using and Safari needed to use either the Ethernet port, or AirPort, so that wouldn't have worked. I guess that the TiVo cannot process and export the info at faster than 100-150 KBps. Oh well.
Trevor

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