Hi new router user here. I've managed to set up our new 645 and connect the Wii, Xbox, iPods and my cell phone. However, I've encountered numerous problems with the DS Lites. After a lot of research I discovered that the DS Lite doesn't support WPA so I've had to switch to WEP. I also turned on MAC filtering to supposedly increase security. However the DS Lite still doesn't work. First I got error 52000 (Google 'nintendo support 52000') and to fix that I had to manually set up a lot of info in teh DS that I didn't really understand. Then I got error 52100 which suggests it's a transmission rate problem and that I should set the router TX rate to '2'. However, the screenshot they show is not for the 645 and the only field I could find in the setup tool for TX rate had only one option which was 'Best (automatic)'. The second option involved keying a lot more info manually into the DS (changing IP address etc) and I'm hoping there is a better solution than that. I've learned a lot in a short time but I don't really want to be changing too many settings on the DS's. Anyone have any ideas? Thanks!