Router Wap2 to WEP

i got a problem with my router.
ok i have the next:

on a tut stays this:

4: Go into the Wi-Fi section then security. And in the, "Network Aunthentication" section, select, "Open" then enable the WEP encryption. Then select the Network Key to, "2" and make up a 13-character password for a 128-bit WEP encryption (If it's 64-bit then it's 5 characters).

where do i put the 2 and what other stuff do i need to fill in to get nintendo wi fi

you need to enter a 10 character string in the box labelled '1'. you may only use numbers 0-9 and letters a-f in the string. You will also have to put this string into the NDS.

do you mean key 1???
because i dont understand it good

yes

do i need only to do it in key 1 or also in the others and where do i need to put that 2

only in key 1, leave the others blank. Make sure you know what it is because your NDS will need it to connect.

yes but where do i need to put that 2
because that was in the guide

you use key 1 instead of key 2. The guide just uses a different key.

i thought were you could choose 1 2 3 or 4

yes, you can choose, I'm just telling you to use 1 because its easier. If you don't use 1 you have to change another setting to tell it which one you are using.