TP-Link 300Mbps Wireless :: WR1403ND - Can't Connect When WMM Is Turned On

Region : Australia
Model : TL-WR1043ND
Hardware Version : V1
Firmware Version :
ISP :

Yesterday I got a new TP-Link TL-WR1403ND Wireless N router. And after trying for ages to try to connect my Galaxy Nexus and iPad (both Wireless N devices), I finally called the TP-Link Support.Both devices could see the wireless, but would never let me join.Anyway, support told me to try connect a laptop if I had one, which I did (a very old one) and it also could not connect. The first thing the tech got me to do was set the mode from mixed-b/g/n to mixed-b/g. This got it to work, and the tech basically said � there you go, works. But the main reason I got this router was to use wireless n.Anyway, I told her that was not acceptable, she then told me to set it back and change the security to WPA-PSK (it was WPA2-PSK). I did this and she also told me to disable WMM.Anyway that worked, so I was happy. I then went and change the security back to WPA2, and it still worked. So the main issue stopping me from connecting to the WiFi from my devices was WMM.So after all that... I looked up WMM, and can see it basically a QoS feature. So why does it not work with my phone, ipad and laptop? I have searched the net, and from what I can see, it is a very Important thing to have WMM turned on. So why won't it work with my devices? All three of them can see the wireless network, I can put the password in, but then they don't connect.I am on the latest firmware (can't check the actual name and version as I am not at home), so is there something wrong with this particular router? Is it a known problem? Do I have a faulty unit?