P.S. I get a 52103 error code, if that helps.
Howdy! I'm not completely positive ... but that sounds like the error code I get on my WiFi at home if I try to go on line with my HG game and I have the security set wrong on my router. There are sometimes several security settings for wireless routers ... a Nintendo DS will only work if your security is set to "none" or to "WEP". If you have yours set to "WPA", for example, you'll get an error when you try to use it. I have found that it (the DS) will detect a WiFi set up with WPA (such as what we have at my work), but when I try to actually connect through the game it generates your "52103" error.
You can get more info at Nintendo's web site at: http://www.nintendo.com/consumer/systems/dslite/index.jsp
Just scroll down to "WiFi Settings" and you'll be able to find all the info on security settings & so forth. I'm fairly sure that the WiFi security settings need to be the same for all the DS systems (not just the "lite").
So, you may want to check the security settings on that wireless connector. Hope that helped ...
Yes ... I'm 55 years old and only began playing Pokémon in '09. I may have to grow old, but I do NOT
have to grow up!
3DS FC (Y and X): 0834-1199-3647
See my photos and paintings on deviantArt at: http://barn0wl.deviantart.com/
"FlagBarn0wl" Blog: http://flagbarnowl.blogspot.com/