WN2000RPT security internet connection problem

I've tried everything listed in these forums including using different encryption, static ip, enabling DHCP from the hidden cnfg page, using different web browsers during setup and nothing seems to work. Here is a new twist though that I haven't seen. I can't get either my laptop nor my netbook to access the internet through the extender, however, my EVO (Sprint cell phone) can. Now how that makes sense, I have NO idea. I'm using a Motorola modem/router using WPA2-PSK AES. Like I said, I've tried using everything except WEP because a) im not familiar with it and b) it's allegedly weak. I can hardwire into the extender and access the internet just fine. The laptop and netbook connect to the extender, but nothing after that. If I turn off the security on the extender, they will access the internet. Frustrating to say the absolute least. Ideas, thoughts, cheers or jeers are all welcome.