Cannot get macs to connect to network

I have an ongoing issue with wireless connection. Our household has 4 macs: one desktop intel core duo running 10.4.9 3 new macbooks running 10.5. I had a netgear rangemax that worked fine until macbooks arrived and then we were no longer able to send email (connection to smtp server timed out) or were able to use the wireless with more than one computer attempting same. We also would be automatically connected to any other unprotected available network but not our own (which was actual beneficial because we could not access through our own)I found changing router mtu to 1428 worked only when I was connected to our network but because we were always automatically connected elsewhere it was a hassle to have to keep re establishing connection .I corresponded with Netgear tech and forums for 2 months...changed mtu, cycled modem, router, etc...finally, I just purchased an Airport Extreme and cannot connect at all through our network, it will only connect to other networks. I have Any help will be greatly appreciated...I do not know what else to do. I have checked settings. I am told I am connected to my network, light is green on Airport base station , it shows up in all settings. I connect only when plugged directly into base station via cable. Thank you

*meant to write that connection only works when I am plugged into cable modem NOT airport base station.Using ethernet cable fromm base station also does not work

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Message was edited by: Lalli

I was going to start a new topic, but since this is here, I will add to it.
I have a home network with 2 Macs that were recently upgraded to leopard (I like to wait), a PC running Windows 2000, a PC running Windows XP, and 2 PC's running Vista. With Tiger, I had no problems whatsoever in finding the various machines and logging into them. It was always immediate and seamless.
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< Edited by Host >

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Cannot get macs to connect to network

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