Problems with DS wifi...

[Meowster]

Maybe somebody here can help...

I'm staying in a hotel at the moment, and I have been informed it has wifi. For some reason though, I can't connect to it!

First I go to wifi settings in Animal CRossing, and it automatically detects the connection point. Since there's a little blue lock logo, I believed this meant I didn't need a password? However, when I tried to connect to it, my DS froze and had to be restarted (it didn't give an error message or anything).

I tried entering the username and password manually that I got from the hotel dudes. I get 'error 51100', but at least it doesn't freeze...

Any idea what the problem could be? Any of you had a similar problem?