EDIT: Every time I tried to enter the Pokemon Platinum GTS, it crashed after asking me to connect (black screen with the first tone from the pokemon centre tune playing continuously). If I boot in DMA: Original Mode (or Normal Mode as it can be known) I get the exact same situation, except now the continuous tone is replaced with the full pokemon centre tune playing. I get no connection errors when running a connection test. However, I do have a new router, which I believed must be the problem. I noticed that many other people are also having this problem, but no solutions have been posted, other than for cyclods where they just slowed the speed down to 50%, something I obviously can't do with the Acekard. I am using a WEP connection (I tried WPA2 but that obviously didn't work as it's for DSiware only) and I've tried opening various ports. Also, other games work fine (although I haven't tested different pokemon games to see if that's the problem, going to try SoulSilver next). I have Platinum Enhanced Edition. Also, I used to be able to connect fine, and the last thing I did was offer a pokemon (Venasaur) in exchange for a Celebi (which I have seen). My router is a Netgear WNR1000v2. Any suggestions?