First off, can you read? "
This forum is NOT for Games help." that is in the forum description of THIS forum.
Second, you might want to write this down or remember it.
At your school turn on your DS with Diamond/Pearl in the system. On the main D/P page (where it has "Continue", "New Game" etc) click on "Nintendo WFC Settings", then click on "Nintendo Wi-Fi Connection Settings" (the big blue button). Once that is done click on a connection (they have "Connection 1, Connection 2, and Connection 3. Click on any of them), and then click "Search for an Access Point". It'll search for one, click the one that comes up, test the connection, and when it says "Connection Successful" you're able to get online.
Now, if this doesn't work, start a thread in
Computer/Technology Discussion. Not in this forum. Trust me, you'll get more help out of Computer/Tech then you will the wrong forum on PC.
*Closed*