Why can't I set a channel?

[wpte]

Yes, channel 6 works fine; I don't need to change the channel now. I was just wondering why my WL-500W fails to configure for other channels.

I'm using a Dell 1500 card on my laptop. I think it's based on Broadcom 4328. I don't see how this is relevant, because this appears to be a router problem.

My card can connect to b/g networks but the router is set up for 802.11n only. Is n supposed to be able to work on channels other than 6?

Yeh well, like I said draft-n needs 40MHz, so when you have it on N only and the bandwidth goes down to 20MHz it's just not possible to provide a proper AP.

I have it on B/G/N and it works on all channels, but I prefer 6 because it's the most stable

My asus RT-N16 is able to provide a N network at any channel it seems