Well I just recently got a DSi XL not too long ago. Probably a month old. Anyways I just recently got a router as well so I now have Wi Fi. Anyways I find this irritating and messed up. Here is the problem. The router is working at maximum signal so I should be connected at all times. I connected the Wi Fi to my DSi's other Wi Fi feature. I forget what you call it but you use it to use the DSi's Wi Fi not the game's Wi Fi. I used it to surf through the internet and etc. Anyways when I try to connect the Wi Fi so I can play games over Wi Fi it gives me this code. 51300 -2. It is just irritating and repulsive how low tech Nintendo's Wi Fi is. Spend the money right when manufacturing assholes!