I posted this same info at linksysinfo.org
I just bought the new wap4400N and I am not impressed.
I have 4 wireless cards and I got only one to work. Dell truemobile1150 senao 802.11g card. 3com travel router setup as client. linksys wmp54g NIC.
I have tried out various configurations and nothing seems to work.
I received the item Friday. I got it setup with my business net IP address and updated to the latest firmware. I saw problems with the dell from the start with 4400N not allowing the connection I could not get it connected. I tried with the senao and everthing worked. I thought that was odd, g worked but the b would not.
{Later, i had to meet a co-worker at panera and my dell connect right away} I get home and same issue with the 4400N.
Today I completed my initial testing. The distance of the 4400N is pretty good. I am about 100 ft away and still have 60%. In my environment, I have an average of 25 ft.
Back to the connection problem.
I check to make sure the dell was scanning and it was. I usually hide the WAP ssid but with all the problems I set it to not-disable. I used netstumbler and once I told it to have the ssid “set to show” netstumbler found the SSID. The network setting shows the SSID but it would not connect. I press the connect button and it still would not connect.
Lastly I took a WMP44G that was connecting to my other WAP54G and change the priority and make the WAP4400N show first. I saw the WMP see the 4400N but I see it quickly disconnect and the WMP connected back to the WAP54G. I removed the SSID on the WAP54G and the WMP would not connect.
I also played with the network type (B/G type, B only, and B/G/N type) and it worked to specs. the computers show the type when activated. I did not test a N only card since I do not have one.
based on this initial I think there is something in the frimware code not letting certain mac through.