Can't add a password?

[Kaaiid]

I have no idea if this is in the right sub category, so i'm so sorry if it's not. My problem is though I can't put a password on my connection. I used to have one, but I had to reset it because of some issues. Now when I access my router and go to change it, I type in the password I want and then it loads for around 15 minutes, until it just stops. I can provide screen shots if need be, and provide any information if someone is willing to help.

 

[Emerald]

are you connected to the router wirelessly or wired when you are configuring it?