Wi-fi not working with HG and SS

i tried getting on wi-fi on the library it wont go in.
it gives me an error number 61020

Replying to #1

maybe you got on the wrong one.if there is one with the WEP protection you will need the password.there should be 2,use the one that doesnt need the password.

i did use them both but i think that its because they are not wep