Wi-Fi help?

okay, in few month back, my Nintendo Wi-Fi work smoothly while I playing online. ^^But...One day, my computer isn't recongize my Wi-Fi USB, I tries everything and does not works...So, for now that I can no longer use my computer Window XP, I manage to use this new (kinda) laptop I used, and it is Window Vista.While I set up my Wi-Fi connection, I use my DSi to connect, my first step is complete, also the second, which is good, but during my last step that it works connect, but at the end, it's... disconnected and having this error: "Error Code: 52103".It said it is unable to connect to Nintendo Wi-Fi... What's wrong with it? Looks like I missing something before I started...Any advice, anyone? Thanks. ^^

i get that a lot when i'm using someone's wifi like at a friend's house or library or something...you should still be able to connect to the internet unless there is something wrong with the connection.

Hrm... *Sigh* I still only having this problem for like 4 month... Ehehe. ^^ Well, I still need to connect Wi-Fi, but the other forum I used to go were no help at all... I guess I need to figure it out...